Penrose tiles to trapdoor ciphers : -- and the return of Dr. Matrix
Martin Gardner · Mathematical Association of America eBooks · 1989
Preface 1. Penrose tiling 2. Penrose tiling II 3. Mandelbrot's fractals 4. Conway's surreal numbers 5. Back from the Klondike and other problems 6. The Oulip 7. The Oulip II 8. Wythoff's Nim 9. Pool-ball triangles and other problems 10. Mathematical induction and colored hats 11. Negative numbers 12. Cutting shapes into N congruent parts 13. Trapdoor ciphers 14. Trapdoor ciphers II 15. Hyperbolas 16. The new Eleusis 17. Ramsey theory 18. From burrs to Berrocal 19. Sicherman dice, the Kruskal count and other curiosities 20. Raymond Smullyan's logic puzzles 21. The return of Dr. Matrix.