# Convergence articles

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This book describes some of the so-called temple geometry problems that Japanese mathematicians posed and solved beginning in the seventeenth century.

Netscape Users
A ladder is placed perpendicular to the plane of the horizon, and in coincidence with the plane of an upright wall.
A teacher agreed to teach 9 months for $562.50 and his board. At the end of the term, on account of two months absence caused by sickness, he received only$409.50. What was his board worth per month?
Apollonius found how to draw normals to an ellipse from points in the ellipse by using hyperbolas. A modern version is presented here.
Paul Halmos Photograph Collection, page 3: M. Auslander, R. Baer, Banchoff, C. N. Moore, I. A. Barnett, P. Erdos, and Lida Barrett
A fox, a raccoon, and a hound pass through customs and together pay 111 coins.
This is the title page of the French edition of Leonhard Euler's text on Algebra. The text was originally published in German in 1767 in St. Petersburg and then translated into French in 1795.
A collection of sixteen posters of contributors to calculus, with brief biographical sketches.
Videotape of aspects of the history of mathematics.