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1 Introduction to Symmetry |
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1 | (28) |
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1 | (3) |
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4 | (5) |
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9 | (5) |
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1D Bounded and Unbounded Objects (Revisited) |
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14 | (3) |
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1E Elements of Mathematics: The Contrapositive |
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17 | (12) |
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19 | (10) |
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2 The Algebra of Symmetry |
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29 | (26) |
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29 | (2) |
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31 | (3) |
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34 | (3) |
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37 | (2) |
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2E One Reflection Is Enough |
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39 | (2) |
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2F An Improved Classification of Rigid Motions |
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41 | (4) |
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2G Elements of Mathematics: The Counterexample |
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45 | (10) |
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47 | (8) |
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3 The Classification Theorems |
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55 | (24) |
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56 | (1) |
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57 | (3) |
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60 | (3) |
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3D Wallpaper Patterns (optional) |
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63 | (4) |
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3E Elements of Mathematics: Equivalence (optional) |
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67 | (12) |
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70 | (9) |
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79 | (16) |
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4A The Definition of an Isomorphism |
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80 | (4) |
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84 | (3) |
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4C A Better Notation for Cyclic Groups |
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87 | (2) |
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4D Elements of Mathematics: The Converse |
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89 | (6) |
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90 | (5) |
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5 Subgroups and Product Groups |
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95 | (16) |
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95 | (4) |
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5B Generated Subgroups (optional) |
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99 | (2) |
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5C Product Groups (optional) |
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101 | (5) |
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5D Elements of Mathematics: Sets versus Lists |
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106 | (5) |
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107 | (4) |
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111 | (24) |
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111 | (3) |
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6B Cycle Notation and Composition |
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114 | (3) |
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6C Even and Odd Permutations |
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117 | (5) |
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6D Symmetries and Permutations |
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122 | (2) |
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6E Elements of Mathematics: Well-Defined |
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124 | (3) |
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6F Elements of Mathematics: The Inductive Proof (optional) |
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127 | (8) |
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129 | (6) |
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7 Symmetries of 3D Objects |
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135 | (36) |
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135 | (5) |
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7B Essentially Two-Dimensional Objects |
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140 | (3) |
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7C A Trick for Counting Symmetries |
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143 | (2) |
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145 | (2) |
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147 | (2) |
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149 | (1) |
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7G The Classification Theorem |
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150 | (3) |
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153 | (3) |
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7I The Full Story (optional) |
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156 | (7) |
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163 | (8) |
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8 The Five Platonic Solids |
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171 | (20) |
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8A The Classification of Platonic Solids |
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171 | (5) |
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176 | (1) |
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177 | (3) |
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180 | (4) |
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8E The Euler Characteristic |
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184 | (1) |
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8F The Platonic Solids Through the Ages |
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185 | (6) |
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187 | (4) |
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9 Symmetry and Optimization |
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191 | (10) |
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191 | (2) |
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193 | (4) |
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9C Elements of Mathematics: Proof by Contradiction |
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197 | (4) |
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198 | (3) |
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201 | (16) |
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202 | (1) |
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10B Integers and Rational Numbers |
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203 | (1) |
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203 | (2) |
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205 | (2) |
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10E Which Real Numbers Are Rational? |
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207 | (2) |
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10F Real Numbers and Symmetry |
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209 | (2) |
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10G Elements of Mathematics: Construction of Rational and Real Numbers |
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211 | (6) |
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213 | (4) |
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217 | (14) |
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11A How Many Prime Numbers Are There? |
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217 | (3) |
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11B The Meaning of "Same Size" |
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220 | (4) |
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11C Are the Rational Numbers Countable? |
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224 | (1) |
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225 | (6) |
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228 | (3) |
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12 Rigid Motions as Functions |
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231 | (12) |
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12A Measuring Distance in Euclidean Space |
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231 | (3) |
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12B Naming the Points on the Unit Circle |
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234 | (2) |
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12C The Dot Product and Perpendicularity |
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236 | (2) |
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12D Using the Dot Product to Find a Friend |
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238 | (1) |
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12E Rigid Motions Are Functions |
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239 | (4) |
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241 | (2) |
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13 Rigid Motions as Matrices |
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243 | (10) |
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243 | (3) |
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13B Representing Rigid Motions as Matrices |
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246 | (3) |
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249 | (1) |
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250 | (3) |
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251 | (2) |
Image Credits |
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253 | (4) |
Index |
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257 | |