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Convergence articles

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Given a right triangle where you know the length of the base and the sum of the perpendicular side and the hypotenuse.

A study and English translation of Servois' attempt to place calculus on a foundation of algebraic analysis without recourse to infinitesimals, continuing the work of Lagrange.
A survey of concepts of infinite sets over the centuries.
A survey of early theories of planetary motion, with dynamic figures to help in understanding these motions.
A cliff with a tower on its edge is observed from a boat at sea; find the height of the cliff and the tower.
Two circles of radii 25 feet intersect so that the distance between their centers is 30 feet. What is the length of the side of the largest square inscribable within their intersecting arcs?
Find two numbers, x and y, such that their sum is 10 and x/y + y/x = 25
In how many ways can a vowel and a consonant be chosen out of the word "logarithms?"
One hundred men besieged in a castle, have sufficient food to allow each one bread to the weight of 14 lot a day for ten months.
Page 4: Images of Jose Barria, Paul Halmos, Robert Bartle, Marshall Stone, Hyman Bass, and Joseph Bastian from the Halmos snapshot collection