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Paul Halmos Photograph Collection, page 3: M. Auslander, R. Baer, Banchoff, C. N. Moore, I. A. Barnett, P. Erdos, and Lida Barrett
A tree is 20 feet tall and has a circumference of 3 feet. There is a vine that winds seven equally spaced times around the tree and reaches the top. What is the length of the vine?
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.
Four episodes in the history of geometry are discussed, where dynamic geometry helps in understanding the ideas.
We sadly announce the untimely death of one of Convergence's editorial board members.
A barrel has various holes in it. The fist hole empties the barrel in three days...
There is a round town 8000 feet in circumference.
A man agreed to pay for 13 valuable houses worth $5000 each, what the last would amount to, reckoning 7 cents for the first, 4 times 7 cents for the second, and so on, increasing the price 4 times on each to the last.
Two circles, the sum of whose radii is a, are placed in the same plane with their centers at a distance 2a...
Download the two winning essays to learn about using indivisibles to find the area under a cycloid arch in the 17th century and about the Radon transform and its use in x-ray tomography in the 20th century.

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