| Number Theory |
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1 | (42) |
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1. Six proofs of the infinity of primes |
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3 | (4) |
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7 | (6) |
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3. Binomial coefficients are (almost) never powers |
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13 | (4) |
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4. Representing numbers as sums of two squares |
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17 | (6) |
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5. Every finite division ring is a field |
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23 | (4) |
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6. Some irrational numbers |
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27 | (8) |
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35 | (8) |
| Geometry |
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43 | (48) |
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8. Hilbert's third problem: decomposing polyhedra |
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45 | (8) |
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9. Lines in the plane and decompositions of graphs |
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53 | (6) |
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59 | (6) |
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11. Three applications of Euler's formula |
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65 | (6) |
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12. Cauchy's rigidity theorem |
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71 | (4) |
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75 | (4) |
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14. Every large point set has an obtuse angle |
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79 | (6) |
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85 | (6) |
| Analysis |
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91 | (46) |
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16. Sets, functions, and the continuum hypothesis |
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93 | (16) |
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17. In praise of inequalities |
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109 | (8) |
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18. A theorem of Pólya on polynomials |
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117 | (6) |
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19. On a lemma of Littlewood and Offord |
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123 | (4) |
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20. Cotangent and the Herglotz trick |
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127 | (6) |
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21. Buffon's needle problem |
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133 | (4) |
| Combinatorics |
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137 | (60) |
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22. Pigeon-hole and double counting |
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139 | (12) |
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29. Three famous theorems on finite set |
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151 | (6) |
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157 | (10) |
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25. Lattice path and determinants |
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167 | (6) |
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26. Cayley's formula for the number of trees |
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173 | (6) |
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27. Completing Latin squares |
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179 | (6) |
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185 | (6) |
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29. Identities versus bijections |
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191 | (6) |
| Graph Theory |
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197 | (39) |
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30. Five-coloring plane graphs |
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199 | (4) |
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31. How to guard a museum |
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203 | (4) |
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207 | (6) |
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33. Communicating without errors |
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213 | (10) |
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34. Of friends and politicians |
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223 | (4) |
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35. Probability makes counting (sometimes) easy |
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227 | (9) |
| About the Illustrations |
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236 | (1) |
| Index |
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237 | |