Underwood Dudley

It is impossible to trisect angles with straightedge and compass alone. This book is about the many people who try and think they have succeeded.

The Trisectors

Written in a lively, engaging style by the author of popular mathematics books, this volume features nearly 1,000 imaginative exercises and problems. Some solutions included. 1978 edition.

Second Edition

Elementary Number Theory

Numerology is the belief that numbers have power over events. It is a descendent of number mysticism, the belief the contemplation of numbers can give mystical and non-rational insights into life, the universe, and everything. Twenty-five hundred years ago, Pythagoras originated number mysticism, crediting certain numbers with characteristics, though numerology is a more recent invention that allots numbers, hence, characteristics to individuals. Underwood Dudley outlines here the history of number mysticism and numerology and gives many examples, including biorhythyms, Bible-numberists, pyram.

Numerology or What Pythagoras Wrought

An introductory guide to elementary number theory for advanced undergraduates and graduates.

A Guide to Elementary Number Theory

It is impossible to trisect angles with straightedge and compass alone, but many people try and think they have succeeded. This book is about angle trisections and the people who attempt them. Its purposes are to collect many trisections in one place, inform about trisectors, to amuse the reader, and, perhaps most importantly, to reduce the number of trisectors. This book includes detailed information about the personalities of trisectors and their constructions. It can be read by anyone who has taken a high school geometry course.

A Budget of Trisections

A delightful collection of articles about people who claim they have achieved the mathematically impossible (squaring the circle, duplicating the cube); people who think they have done something they have not (proving Fermat's Last Theorem); people who pray in matrices; people who find the American Revolution ruled by the number 57; people who have in common eccentric mathematical views, some mild (thinking we should count by 12s instead of 10s), some bizarre (thinking that second-order differential equations will solve all problems of economics, politics and philosophy). This is a truly uniqu.

Mathematical Cranks

Owen O'Shea

A fascinating collection of numerical curiosities and wonders. The Professor in Owen O Shea s book is the imaginary American Richard Stein. As Owen O Shea and the Professor travel through Ireland, O Shea notes the Professor s collection of amazing magic numbers in fascinating detail. His mathematical curiosities are wide ranging, concerning the 1915 sinking of the Lusitania to coincidences about Apollo 11 to the first moon walk to new numerical curiosities. The new curiosities, among many others, center on Presidents Lincoln and Kennedy, the USA and Ireland, the two World Wars, the King James Version of the Bible, and James Joyce. The Magic Numbers of the Professor reveals astonishing details about the year 1776; the year of American Independence. It contains discussions on prime numbers, gives some wonderful number patterns, and reveals many other eye-opening properties of numbers. It asks, for instance, if you know in how many different ways a US dollar can be changed. The Professor gives the answer to this and other currency questions. The number of the Beast 666, is discussed as well, as are many new equations involving that famous number all appearing here for the first time. And for those fascinated by games and gambling, a number of curious proposition bets involving dice, darts, and playing cards, and various mathematical puzzles are scattered throughout this singularly entertaining book.

Underwood Dudley

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