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1 The System of Numbers: An Overview |
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1 | (16) |
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1.1 From natural to real numbers |
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3 | (6) |
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9 | (2) |
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1.3 Polynomials and transcendental numbers |
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11 | (4) |
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1.4 Cardinals and ordinals |
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15 | (2) |
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2 Writing Numbers---Now and Back Then |
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17 | (14) |
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2.1 Writing numbers nowadays: positional and decimal |
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17 | (7) |
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2.2 Writing numbers back then: Egypt, Babylon and Greece |
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24 | (7) |
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3 Numbers and Magnitudes in the Greek Mathematical Tradition |
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31 | (32) |
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32 | (3) |
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3.2 Ratios and proportions |
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35 | (4) |
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39 | (3) |
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3.4 Eudoxus' theory of proportions |
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42 | (3) |
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3.5 Greek fractional numbers |
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45 | (2) |
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3.6 Comparisons, not measurements |
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47 | (3) |
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50 | (13) |
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Appendix 3.1 The incommensurability of √2. Ancient and modern proofs |
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52 | (3) |
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Appendix 3.2 Eudoxus' theory of proportions in action |
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55 | (4) |
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Appendix 3.3 Euclid and the area of the circle |
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59 | (4) |
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4 Construction Problems and Numerical Problems in the Greek Mathematical Tradition |
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63 | (24) |
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4.1 The arithmetic books of the Elements |
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64 | (2) |
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66 | (1) |
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4.3 Straightedge and compass |
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67 | (4) |
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4.4 Diophantus' numerical problems |
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71 | (7) |
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4.5 Diophantus' reciprocals and fractions |
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78 | (2) |
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4.6 More than three dimensions |
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80 | (7) |
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Appendix 4.1 Diophantus' solution of Problem V.9 in Arithmetica |
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83 | (4) |
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5 Numbers in the Tradition of Medieval Islam |
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87 | (38) |
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5.1 Islamicate science in historical perspective |
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88 | (2) |
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5.2 Al-Khwarizmi and numerical problems with squares |
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90 | (4) |
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5.3 Geometry and certainty |
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94 | (3) |
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5.4 Al-jabr wa'l-muqabala |
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97 | (3) |
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5.5 Al-Khwarizmi, numbers and fractions |
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100 | (3) |
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5.6 Abu Kamil's numbers at the crossroads of two traditions |
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103 | (4) |
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5.7 Numbers, fractions and symbolic methods |
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107 | (4) |
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5.8 Al-Khayyam and numerical problems with cubes |
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111 | (5) |
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5.9 Gersonides and problems with numbers |
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116 | (9) |
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Appendix 5.1 The quadratic equation. Derivation of the algebraic formula |
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120 | (1) |
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Appendix 5.2 The cubic equation. Khayyam's geometric solution |
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121 | (4) |
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6 Numbers in Europe from the Twelfth to the Sixteenth Centuries |
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125 | (30) |
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6.1 Fibonacci and Hindu--Arabic numbers in Europe |
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128 | (1) |
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6.2 Abbacus and coss traditions in Europe |
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129 | (9) |
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6.3 Cardano's Great Art of Algebra |
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138 | (8) |
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6.4 Bombelli and the roots of negative numbers |
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146 | (3) |
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6.5 Euclid's Elements in the Renaissance |
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149 | (6) |
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Appendix 6.1 Casting out nines |
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150 | (5) |
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7 Number and Equations at the Beginning of the Scientific Revolution |
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155 | (20) |
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7.1 Viete and the new art of analysis |
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157 | (6) |
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7.2 Stevin and decimal fractions |
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163 | (4) |
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7.3 Logarithms and the decimal system of numeration |
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167 | (8) |
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Appendix 7.1 Napier's construction of logarithmic tables |
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171 | (4) |
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8 Number and Equations in the Works of Descartes, Newton and their Contemporaries |
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175 | (32) |
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8.1 Descartes' new approach to numbers and equations |
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176 | (6) |
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8.2 Wallis and the primacy of algebra |
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182 | (5) |
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8.3 Barrow and the opposition to the primacy of algebra |
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187 | (3) |
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8.4 Newton's Universal Arithmetick |
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190 | (17) |
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Appendix 8.1 The quadratic equation. Descartes' geometric solution |
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196 | (2) |
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Appendix 8.2 Between geometry and algebra in the seventeenth century: The case of Euclid's Elements |
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198 | (9) |
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9 New Definitions of Complex Numbers in the Early Nineteenth Century |
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207 | (16) |
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9.1 Numbers and ratios: giving up metaphysics |
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208 | (1) |
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9.2 Euler, Gauss and the ubiquity of complex numbers |
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209 | (3) |
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9.3 Geometric interpretations of the complex numbers |
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212 | (3) |
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9.4 Hamilton's formal definition of complex numbers |
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215 | (2) |
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9.5 Beyond complex numbers |
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217 | (3) |
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9.6 Hamilton's discovery of quaternions |
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220 | (3) |
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10 "What Are Numbers and What Should They Be?" Understanding Numbers in the Late Nineteenth Century |
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223 | (26) |
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224 | (1) |
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10.2 Kummer's ideal numbers |
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225 | (3) |
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10.3 Fields of algebraic numbers |
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228 | (3) |
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10.4 What should numbers be? |
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231 | (3) |
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10.5 Numbers and the foundations of calculus |
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234 | (3) |
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10.6 Continuity and irrational numbers |
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237 | (12) |
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Appendix 10.1 Dedekind's theory of cuts and Eudoxus' theory of proportions |
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243 | (2) |
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Appendix 10.2 IVT and the fundamental theorem of calculus |
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245 | (4) |
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11 Exact Definitions for the Natural Numbers: Dedekind, Peano and Frege |
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249 | (16) |
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11.1 The principle of mathematical induction |
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250 | (1) |
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251 | (6) |
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11.3 Dedekind's chains of natural numbers |
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257 | (2) |
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11.4 Frege's definition of cardinal numbers |
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259 | (6) |
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Appendix 11.1 The principle of induction and Peano's postulates |
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262 | (3) |
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12 Numbers, Sets and Infinity. A Conceptual Breakthrough at the Turn of the Twentieth Century |
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265 | (26) |
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12.1 Dedekind, Cantor and the infinite |
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266 | (3) |
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12.2 Infinities of various sizes |
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269 | (8) |
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12.3 Cantor's transfinite ordinals |
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277 | (3) |
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12.4 Troubles in paradise |
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280 | (11) |
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Appendix 12.1 Proof that the set of algebraic numbers is countable |
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287 | (4) |
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13 Epilogue: Numbers in Historical Perspective |
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291 | (4) |
References and Suggestions for Further Reading |
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295 | (8) |
Name Index |
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303 | (3) |
Subject Index |
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306 | |