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Convergence articles

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The cost per hour of running a certain steamboat is proportional to the cube of its velocity in still water. At what speed should it be run to make a trip up stream against a four-mile current most economically?
Chuquet claimed that if given positive numbers a, b, c, d then (a + b) / (c + d) lies between a/c and b/d. Is he correct? Prove your answer
A collection of sixteen posters of contributors to calculus, with brief biographical sketches.
Two men brought their fish through customs. Find how much the fish cost, and what is the customs fee.
Videotape of aspects of the history of mathematics.
This conference takes place in 2006 at Pennsylvania State University, Erie.
A certain merchant increases the value of his estate by 1/3...

An excellent and careful study of matrix methods for solving systems of linear equations in first century China.

A set of n disjoint, congruent circles packs the surface of a sphere S so that each region of the surface exterior to the circles is bounded by arcs of three of the circles.
Photo of Plimpton 322, an old Babylonian Tablet, from the Plimpton Collection at the Columbia University Library. Part of the Mathematical Treasures section of Loci: Convergence.