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Convergence articles

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

A two door gate of unknown width is opened so that a 2 ts'un gap exists between the two doors.

Now a good horse and an inferior horse set out from Chang'an to Qi. Qi is 3000 li from Chang'an.

Review of Bertram's text on the history of Greek science.

Three persons bought a sugar loaf in the form of a perfect cone 25 inches high and agreed to divide it...what was the slant height of each one's share?

The Tree of Proportions and Proportionality from the De Divina Proportione of Luca Pacioli published in 1509.
Netscape Users

A collection of articles on mathematics in Europe from the twelfth to the fifteenth century.

Request from the editors.

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?

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