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PART I ATOMIC NATURE OF MATTER |
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1 Molecular size from classical fluids |
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3 | (17) |
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1.1 Two relations of molecular size and the Avogadro number |
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4 | (1) |
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1.2 The relation for the effective viscosity |
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5 | (3) |
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1.2.1 The equation of motion for a viscous fluid |
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5 | (1) |
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1.2.2 Viscosity and heat loss in a fluid |
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6 | (2) |
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1.2.3 Volume fraction in terms of molecular dimensions |
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8 | (1) |
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1.3 The relation for the diffusion coefficient |
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8 | (3) |
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9 | (1) |
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1.3.2 Frictional drag force---the Stokes law |
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10 | (1) |
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1.4 SuppMat: Basics of fluid mechanics |
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11 | (2) |
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1.4.1 The equation of continuity |
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12 | (1) |
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1.4.2 The Euler equation for an ideal fluid |
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12 | (1) |
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1.5 SuppMat: Calculating the effective viscosity |
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13 | (5) |
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1.5.1 The induced velocity field v' |
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14 | (1) |
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1.5.2 The induced pressure field p' |
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15 | (1) |
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1.5.3 Heat dissipation in a fluid with suspended particles |
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15 | (3) |
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1.6 SuppMat: The Stokes formula for the viscous force |
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18 | (2) |
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20 | (11) |
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2.1 Diffusion and Brownian motion |
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21 | (3) |
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2.1.1 Einstein's statistical derivation of the diffusion equation |
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22 | (1) |
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2.1.2 The solution of the diffusion equation and the mean-square displacement |
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23 | (1) |
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2.2 Fluctuations of a particle system |
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24 | (1) |
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24 | (1) |
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2.2.2 Brownian motion as a random walk |
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25 | (1) |
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2.3 The Einstein--Smoluchowski relation |
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25 | (2) |
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2.3.1 Fluctuation and dissipation |
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27 | (1) |
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2.3.2 Mean-square displacement and molecular dimensions |
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27 | (1) |
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2.4 Perrin's experimental verification |
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27 | (4) |
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3 Blackbody radiation: From Kirchhoff to Planck |
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31 | (19) |
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3.1 Radiation as a collection of oscillators |
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32 | (2) |
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3.1.1 Fourier components of radiation obey harmonic oscillator equations |
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33 | (1) |
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3.2 Thermodynamics of blackbody radiation |
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34 | (5) |
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3.2.1 Radiation energy density is a universal function |
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34 | (1) |
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3.2.2 The Stefan--Boltzmann law |
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35 | (1) |
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3.2.3 Wien's displacement law |
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36 | (2) |
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3.2.4 Planck's distribution proposed |
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38 | (1) |
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3.3 Planck's investigation of cavity oscillator entropy |
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39 | (2) |
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3.3.1 Relating the oscillator energy to the radiation density |
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39 | (1) |
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3.3.2 The mean entropy of an oscillator |
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40 | (1) |
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3.4 Planck's statistical analysis leading to energy quantization |
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41 | (4) |
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3.4.1 Calculating the complexion of Planck's distribution |
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41 | (3) |
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3.4.2 Planck's constant and Boltzmann's constant |
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44 | (1) |
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3.4.3 Planck's energy quantization proposal---a summary |
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45 | (1) |
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3.5 SuppMat: Radiation oscillator energy and frequency |
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45 | (5) |
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3.5.1 The ratio of the oscillator energy and frequency is an adiabatic invariant |
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46 | (2) |
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3.5.2 The thermodynamic derivation of the relation between radiation pressure and energy density |
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48 | (2) |
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4 Einstein's proposal of light quanta |
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50 | (12) |
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4.1 The equipartition theorem and the Rayleigh--Jeans law |
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51 | (4) |
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4.1.1 Einstein's derivation of the Rayleigh--Jeans law |
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52 | (1) |
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4.1.2 The history of the Rayleigh--Jeans law and "Planck's fortunate failure" |
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53 | (1) |
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4.1.3 An excursion to Rayleigh's calculation of the density of wave states |
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54 | (1) |
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4.2 Radiation entropy and complexion a la Einstein |
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55 | (4) |
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4.2.1 The entropy and complexion of radiation in the Wien limit |
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55 | (2) |
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4.2.2 The entropy and complexion of an ideal gas |
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57 | (1) |
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4.2.3 Radiation as a gas of light quanta |
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58 | (1) |
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4.2.4 Photons as quanta of radiation |
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59 | (1) |
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4.3 The photoelectric effect |
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59 | (1) |
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4.4 SuppMat: The equipartition theorem |
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60 | (2) |
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5 Quantum theory of specific heat |
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62 | (11) |
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5.1 The quantum postulate: Einstein vs. Planck |
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62 | (2) |
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5.1.1 Einstein's derivation of Planck's distribution |
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63 | (1) |
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5.2 Specific heat and the equipartition theorem |
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64 | (3) |
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5.2.1 The study of heat capacity in the pre-quantum era |
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65 | (1) |
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5.2.2 Einstein's quantum insight |
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66 | (1) |
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5.3 The Einstein solid---a quantum prediction |
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67 | (2) |
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5.4 The Debye solid and phonons |
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69 | (4) |
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5.4.1 Specific heat of a Debye solid |
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71 | (1) |
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5.4.2 Thermal quanta vs. radiation quanta |
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72 | (1) |
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6 Waves, particles, and quantum jumps |
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73 | (21) |
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6.1 Wave--particle duality |
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74 | (4) |
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6.1.1 Fluctuation theory (Einstein 1904) |
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75 | (1) |
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6.1.2 Energy fluctuation of radiation (Einstein 1909a) |
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75 | (3) |
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6.2 Bohr's atom---another great triumph of the quantum postulate |
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78 | (4) |
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6.2.1 Spectroscopy: Balmer and Rydberg |
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78 | (1) |
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6.2.2 Atomic structure: Thomson and Rutherford |
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79 | (1) |
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6.2.3 Bohr's quantum model and the hydrogen spectrum |
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79 | (3) |
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6.3 Einstein's A and B coefficients |
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82 | (3) |
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6.3.1 Probability introduced in quantum dynamics |
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82 | (2) |
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6.3.2 Stimulated emission and the idea of the laser |
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84 | (1) |
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6.4 Looking ahead to quantum field theory |
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85 | (7) |
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6.4.1 Oscillators in matrix mechanics |
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85 | (3) |
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6.4.2 Quantum jumps: From emission and absorption of radiation to creation and annihilation of particles |
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88 | (3) |
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6.4.3 Resolving the riddle of wave--particle duality in radiation fluctuation |
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91 | (1) |
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6.5 SuppMat: Fluctuations of a wave system |
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92 | (2) |
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7 Bose--Einstein statistics and condensation |
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94 | (18) |
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7.1 The photon and the Compton effect |
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95 | (1) |
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7.2 Towards Bose--Einstein statistics |
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96 | (6) |
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7.2.1 Boltzmann statistics |
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97 | (1) |
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7.2.2 Bose's counting of photon states |
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98 | (2) |
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7.2.3 Einstein's elaboration of Bose's counting statistics |
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100 | (2) |
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7.3 Quantum mechanics and identical particles |
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102 | (3) |
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7.3.1 Wave mechanics: de Broglie--Einstein--Schrodinger |
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102 | (1) |
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7.3.2 Identical particles are truly identical in quantum mechanics |
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103 | (1) |
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7.3.3 Spin and statistics |
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103 | (1) |
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7.3.4 The physical implications of symmetrization |
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104 | (1) |
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7.4 Bose--Einstein condensation |
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105 | (3) |
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7.4.1 Condensate occupancy calculated |
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105 | (1) |
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7.4.2 The condensation temperature |
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106 | (1) |
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7.4.3 Laboratory observation of Bose--Einstein condensation |
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107 | (1) |
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7.5 SuppMat: Radiation pressure due to a gas of photons |
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108 | (1) |
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7.6 SuppMat: Planck's original analysis in view of Bose--Einstein statistics |
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109 | (1) |
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7.7 SuppMat: The role of particle indistinguishability in Bose--Einstein condensation |
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110 | (2) |
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8 Local reality and the Einstein--Bohr debate |
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112 | (15) |
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8.1 Quantum mechanical basics---superposition and probability |
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112 | (1) |
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8.2 The Copenhagen interpretation |
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113 | (1) |
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8.2.1 The Copenhagen vs. the local realist interpretations |
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113 | (1) |
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8.3 EPR paradox: Entanglement and nonlocality |
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114 | (7) |
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8.3.1 The post-EPR era and Bell's inequality |
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117 | (2) |
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8.3.2 Local reality vs. quantum mechanics---the experimental outcome |
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119 | (2) |
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8.4 SuppMat: Quantum mechanical calculation of spin correlations |
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121 | (6) |
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8.4.1 Quantum mechanical calculation of spin average values |
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121 | (1) |
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8.4.2 Spin correlation in one direction |
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122 | (1) |
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8.4.3 Spin correlation in two directions |
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123 | (4) |
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PART III SPECIAL RELATIVITY |
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9 Prelude to special relativity |
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127 | (20) |
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9.1 Relativity as a coordinate symmetry |
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128 | (1) |
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9.1.1 Inertial frames of reference and Newtonian relativity |
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128 | (1) |
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129 | (2) |
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9.2.1 The electromagnetic wave equation |
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130 | (1) |
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9.2.2 Aether as the medium for electromagnetic wave propagation |
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131 | (1) |
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9.3 Experiments and theories prior to special relativity |
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131 | (8) |
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9.3.1 Stellar aberration and Fizeau's experiment |
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131 | (2) |
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9.3.2 Lorentz's corresponding states and local time |
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133 | (3) |
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9.3.3 The Michelson--Morley experiment |
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136 | (1) |
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9.3.4 Length contraction and the Lorentz transformation |
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137 | (1) |
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9.3.5 Poincare and special relativity |
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138 | (1) |
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9.4 Reconstructing Einstein's motivation |
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139 | (4) |
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9.4.1 The magnet and conductor thought experiment |
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139 | (2) |
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9.4.2 From "no absolute time" to the complete theory in five weeks |
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141 | (1) |
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9.4.3 Influence of prior investigators in physics and philosophy |
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142 | (1) |
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9.5 SuppMat: Lorentz transformation a la Lorentz |
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143 | (4) |
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9.5.1 Maxwell's equations are not Galilean covariant |
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143 | (1) |
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9.5.2 Lorentz's local time and noncovariance at O(v2/c2) |
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144 | (2) |
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9.5.3 Maxwell's equations are Lorentz covariant |
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146 | (1) |
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10 The new kinematics and E = mc2 |
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147 | (19) |
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148 | (6) |
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10.1.1 Einstein's two postulates |
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148 | (1) |
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10.1.2 The new conception of time and the derivation of the Lorentz transformation |
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149 | (2) |
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10.1.3 Relativity of simultaneity, time dilation, and length contraction |
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151 | (3) |
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10.2 The new velocity addition rule |
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154 | (2) |
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10.2.1 The invariant spacetime interval |
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154 | (1) |
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10.2.2 Adding velocities but keeping light speed constant |
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155 | (1) |
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10.3 Maxwell's equations are Lorentz covariant |
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156 | (2) |
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10.3.1 The Lorentz transformation of electromagnetic fields |
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156 | (2) |
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10.3.2 The Lorentz transformation of radiation energy |
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158 | (1) |
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10.4 The Lorentz force law |
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158 | (1) |
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10.5 The equivalence of inertia and energy |
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159 | (3) |
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10.5.1 Work--energy theorem in relativity |
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159 | (1) |
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10.5.2 The E = mc2 paper three months later |
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160 | (2) |
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10.6 SuppMat: Relativistic wave motion |
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162 | (2) |
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10.6.1 The Fresnel formula from the velocity addition rule |
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162 | (1) |
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10.6.2 The Doppler effect and aberration of light |
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162 | (1) |
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10.6.3 Derivation of the radiation energy transformation |
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163 | (1) |
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10.7 SuppMat: Relativistic momentum and force |
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164 | (2) |
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11 Geometric formulation of relativity |
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166 | (17) |
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167 | (2) |
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11.1.1 Rotation in 3D space---a review |
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168 | (1) |
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11.1.2 The Lorentz transformation as a rotation in 4D spacetime |
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168 | (1) |
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11.2 Tensors in a flat spacetime |
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169 | (7) |
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11.2.1 Tensor contraction and the metric |
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169 | (2) |
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11.2.2 Minkowski spacetime is pseudo-Euclidean |
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171 | (1) |
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11.2.3 Relativistic velocity, momentum, and energy |
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172 | (1) |
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11.2.4 The electromagnetic field tensor |
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173 | (1) |
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11.2.5 The energy--momentum--stress tensor for a field system |
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174 | (2) |
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11.3 The spacetime diagram |
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176 | (3) |
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11.3.1 Basic features and invariant regions |
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176 | (1) |
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11.3.2 Lorentz transformation in the spacetime diagram |
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177 | (2) |
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11.4 The geometric formulation---a summary |
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179 | (4) |
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PART IV GENERAL RELATIVITY |
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12 Towards a general theory of relativity |
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183 | (17) |
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12.1 Einstein's motivations for general relativity |
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184 | (1) |
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12.2 The principle of equivalence between inertia and gravitation |
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184 | (3) |
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12.2.1 The inertia mass vs. the gravitational mass |
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184 | (2) |
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12.2.2 "My happiest thought" |
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186 | (1) |
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12.3 Implications of the equivalence principle |
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187 | (6) |
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12.3.1 Bending of a light ray |
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187 | (1) |
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12.3.2 Gravitational redshift |
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188 | (2) |
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12.3.3 Gravitational time dilation |
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190 | (1) |
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12.3.4 Gravity-induced index of refraction in free space |
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191 | (1) |
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12.3.5 Light ray deflection calculated |
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192 | (1) |
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12.3.6 From the equivalence principle to "gravity as the structure of spacetime" |
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193 | (1) |
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12.4 Elements of Riemannian geometry |
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193 | (7) |
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12.4.1 Gaussian coordinates and the metric tensor |
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194 | (1) |
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195 | (2) |
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197 | (1) |
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197 | (3) |
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13 Curved spacetime as a gravitational field |
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200 | (16) |
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13.1 The equivalence principle requires a metric description of gravity |
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201 | (3) |
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13.1.1 What is a geometric theory? |
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201 | (1) |
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13.1.2 Time dilation as a geometric effect |
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202 | (1) |
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13.1.3 Further arguments for warped spacetime as the gravitational field |
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203 | (1) |
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13.2 General relativity as a field theory of gravitation |
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204 | (3) |
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13.2.1 The geodesic equation as the general relativity equation of motion |
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205 | (1) |
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13.2.2 The Newtonian limit |
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205 | (2) |
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13.3 Tensors in a curved spacetime |
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207 | (6) |
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13.3.1 General coordinate transformations |
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207 | (2) |
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13.3.2 Covariant differentiation |
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209 | (4) |
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13.4 The principle of general covariance |
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213 | (3) |
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13.4.1 The principle of minimal substitution |
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213 | (1) |
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13.4.2 Geodesic equation from the special relativity equation of motion |
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214 | (2) |
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14 The Einstein field equation |
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216 | (18) |
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14.1 The Newtonian field equation |
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217 | (1) |
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14.2 Seeking the general relativistic field equation |
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218 | (1) |
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14.3 Curvature tensor and tidal forces |
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219 | (6) |
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14.3.1 Tidal forces---a qualitative discussion |
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219 | (1) |
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14.3.2 Newtonian deviation equation and the equation of geodesic deviation |
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220 | (2) |
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14.3.3 Symmetries and contractions of the curvature tensor |
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222 | (1) |
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14.3.4 The Bianchi identities and the Einstein tensor |
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223 | (2) |
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14.4 The Einstein equation |
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225 | (1) |
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14.4.1 The Newtonian limit for a general source |
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225 | (1) |
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14.4.2 Gravitational waves |
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226 | (1) |
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14.5 The Schwarzschild solution |
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226 | (8) |
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14.5.1 Three classical tests |
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228 | (3) |
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14.5.2 Black holes---the full power and glory of general relativity |
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231 | (3) |
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234 | (21) |
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15.1 The cosmological principle |
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235 | (5) |
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15.1.1 The Robertson--Walker spacetime |
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236 | (2) |
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15.1.2 The discovery of the expanding universe |
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238 | (1) |
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15.1.3 Big bang cosmology |
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239 | (1) |
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15.2 Time evolution of the universe |
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240 | (4) |
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15.2.1 The FLRW cosmology |
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240 | (2) |
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15.2.2 Mass/energy content of the universe |
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242 | (2) |
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15.3 The cosmological constant |
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244 | (11) |
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15.3.1 Einstein and the static universe |
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244 | (3) |
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15.3.2 The Inflationary epoch |
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247 | (2) |
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15.3.3 The dark energy leading to an accelerating universe |
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249 | (6) |
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PART V WALKING IN EINSTEIN'S STEPS |
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16 Internal symmetry and gauge interactions |
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255 | (28) |
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16.1 Einstein and the symmetry principle |
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256 | (1) |
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16.2 Gauge invariance in classical electromagnetism |
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257 | (4) |
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16.2.1 Electromagnetic potentials and gauge transformation |
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258 | (1) |
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16.2.2 Hamiltonian of a charged particle in an electromagnetic field |
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259 | (2) |
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16.3 Gauge symmetry in quantum mechanics |
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261 | (5) |
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16.3.1 The minimal substitution rule |
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261 | (1) |
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16.3.2 The gauge transformation of wavefunctions |
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262 | (1) |
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16.3.3 The gauge principle |
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263 | (3) |
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16.4 Electromagnetism as a gauge interaction |
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266 | (4) |
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16.4.1 The 4D spacetime formalism recalled |
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266 | (2) |
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16.4.2 The Maxwell Lagrangian density |
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268 | (1) |
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16.4.3 Maxwell equations from gauge and Lorentz symmetries |
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269 | (1) |
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16.5 Gauge theories: A narrative history |
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270 | (13) |
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16.5.1 Einstein's inspiration, Weyl's program, and Fock's discovery |
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270 | (1) |
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16.5.2 Quantum electrodynamics |
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271 | (2) |
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16.5.3 QCD as a prototype Yang--Mills theory |
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273 | (3) |
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16.5.4 Hidden gauge symmetry and the electroweak interaction |
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276 | (4) |
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16.5.5 The Standard Model and beyond |
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280 | (3) |
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17 The Kaluza--Klein theory and extra dimensions |
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283 | (22) |
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17.1 Unification of electrodynamics and gravity |
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284 | (3) |
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17.1.1 Einstein and unified field theory |
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284 | (1) |
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17.1.2 A geometric unification |
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284 | (1) |
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17.1.3 A rapid review of electromagnetic gauge theory |
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285 | (1) |
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17.1.4 A rapid review of general relativistic gravitational theory |
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286 | (1) |
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17.2 General relativity in 5D spacetime |
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287 | (2) |
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17.2.1 Extra spatial dimension and the Kaluza--Klein metric |
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287 | (1) |
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17.2.2 "The Kaluza--Klein miracle" |
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288 | (1) |
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17.3 The physics of the Kaluza--Klein spacetime |
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289 | (3) |
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17.3.1 Motivating the Kaluza--Klein metric ansatz |
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289 | (1) |
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17.3.2 Gauge transformation as a 5D coordinate change |
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289 | (1) |
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17.3.3 Compactified extra dimension |
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290 | (1) |
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17.3.4 Quantum fields in a compactified space |
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290 | (2) |
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17.4 Further theoretical developments |
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292 | (1) |
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17.4.1 Lessons from Maxwell's equations |
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292 | (1) |
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17.4.2 Einstein and mathematics |
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293 | (1) |
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17.5 SuppMat: Calculating the 5D tensors |
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293 | (12) |
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17.5.1 The 5D Christoffel symbols |
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294 | (3) |
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17.5.2 The 5D Ricci tensor components |
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297 | (5) |
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17.5.3 From 5D Ricci tensor to 5D Ricci scalar |
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302 | (3) |
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A Mathematics supplements |
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305 | (15) |
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305 | (7) |
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A.1.1 The Kronecker delta and Levi-Civita symbols |
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305 | (2) |
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A.1.2 Differential calculus of a vector field |
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307 | (1) |
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A.1.3 Vector integral calculus |
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308 | (2) |
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A.1.4 Differential equations of Maxwell electrodynamics |
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310 | (2) |
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A.2 The Gaussian integral |
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312 | (1) |
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A.3 Stirling's approximation |
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313 | (2) |
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A.3.1 The integral representation for n! |
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313 | (1) |
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A.3.2 Derivation of Stirling's formula |
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314 | (1) |
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A.4 Lagrangian multipliers |
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315 | (2) |
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315 | (1) |
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315 | (2) |
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A.5 The Euler--Lagrange equation |
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317 | (3) |
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A.5.1 Mechanics of a single particle |
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317 | (1) |
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A.5.2 Lagrangian density of a field system |
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318 | (2) |
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320 | (5) |
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B.1 Einstein's journal articles cited in the text |
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320 | (3) |
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323 | (2) |
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C Answers to the 21 Einstein questions |
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325 | (6) |
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Glossary of symbols and acronyms |
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331 | (6) |
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331 | (2) |
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333 | (1) |
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334 | (1) |
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4 Miscellaneous units and symbols |
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335 | (2) |
Bibliography |
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337 | (6) |
Index |
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343 | |