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Convergence articles

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A discussion of aspects of Leonardo of Pisa's Book of Squares.

A history of the concept of zero from as far back as the Babylonian period, with philosophical excursions into the meaning of "nothing".

NCTM Meeting in Philadelphia
This article contains examples of the use of the rule of false position in the solution of geometric problems as found in the work of Simon Stevin. We discuss the benefits for future teachers and their students.
As this biography reveals, Servois fought in battles for Paris and for the foundations of calculus.
The Fibonacci numbers and applications to areas such as plant growth and stock market predictions.
The work of ten scientists who thought deeply about patterns.
Twenty-three weary travelers entered a delightful forest. There they found 63 numerically equal piles of plantain fruit.
A portrait gallery of mathematicians, mostly taken from the collection at the Dibner Library of the Smithsonian, with permission.
This a wonderfully written tour of aspects of classical geometry-- a must read for all geometry teachers.