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Convergence articles

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A brief version of the author's well-known history of mathematics text.
A history of algebra from its early beginnings to the twentieth century.

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

Here are all articles, classroom activities, and reviews arranged into annual volumes starting with 2004.

A farmer sold a team of horses for $440, but did not receive his pay for them until 1 yr, 8 mo after the sale. He had at the same time another offer of $410 for them. Did he gain or lose by the sale and by how much, money being worth 6%/yr?
A song for Pi Day.
Two excellent volumes on Euler in honor of his three hundredth birthday
This a wonderfully written tour of aspects of classical geometry-- a must read for all geometry teachers.
The three sides of a triangular piece of land, taken in order, measure 15, 10, and 13 chains respectively.