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The author became fascinated with the mysterious role of √-1 in electronics. Turning to history for insight, he brings the perspectives of both a practical man and a scholar in conveying the enchantment of mathematics for a non-mathematician.

A wide-ranging website with links to many sources in the history of mathematics.

This is page 167 from the Exercitationes mathematicae (1657) of Frans van Schooten (1615-1660). This book contained a collection of mathematical construction problems, among much else. It was one of the books read by Isaac Newton while he was a student at Cambridge University and helped to introduce him to modern mathematics. On this page we see a construction enabling one to find the distance across a river.
The story of the negative numbers
There is a log of precious wood 18 feet long whose bases are 5 feet and 2.5 feet in circumference. Into what lengths should the log be cut to trisect its volume?

The "rood", a linear measure dating from many centuries ago, is calculated anew in today's classrooms.

The two final volumes of the MAA tercentenary series on Euler present numerous papers on various aspects of Euler's life and work.
Problems taken from Chinese sources
2007 marks the three hundredth anniversary of the birth of Leonhard Euler, the most prolific mathematician of all time. There are numerous events throughout the world celebrating this anniversary, many of which are listed here.

A bibliographical reference to mathematics books printed in the new world before 1700.