Böcker av Martin Gardner

Introduces us to this extraordinary man, Dr Irving Joshua Matrix. Believed by many to be the greatest numerologist who ever lived, Dr Matrix claims to be a reincarnation of Pythagoras. This title follows Dr Matrix as he roams the world and assumes new identities and discovers new manifestations of the power of numbers to explain and predict.

Cipher and decipher codes: transposition and polyalphabetical ciphers, famous codes, typewriter and telephone codes, codes that use playing cards, knots, and swizzle sticks . . . even invisible writing and sending messages through space. 45 diagrams.

First published in 1910, this text aims to make the topic of calculus accessible to students of mathematics. Gardner has updated the text to reflect developments in method and terminology, written an extensive preface and three new chapters, and added more than 20 recreational problems.