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Convergence articles

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A letter to Sam Greitzer, late editor of Arbelos, discussing the derivation of two formulas for calculating pi.
This book explores the history of mathematics from the perspective of the creative tension between common sense and the "impossible" as the author follows the discovery or invention of new concepts that have marked mathematical progress.


A great book from which to learn and teach the subject of relativity.
A collection of biographies of sixty mathematicians from the eighteenth century to the twentieth.
The authors recount the 'great tale' of Napier's and Burgi's parallel development of logarithms and urge you to use it in class.
What is the sum of the reciprocals of the triangular numbers?
Circular Images

Curve sketching, tangent lines, and optimization, explored via interactive applets

In the figure at the left, if the radii of each inscribed circle is 1, what are the dimensions of the bounding rectangle?
Age
My age is a number consisting of two digits, 1/2 of this number is a mean proportional between these two digits, and two years hence, my age will be a third proportional to the same two digits, directly as they stand in my present age.

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Dummy View - NOT TO BE DELETED