Mathematics
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Joseph O'Rourke

Professor & chair of Computer Science; Professor of Mathematics.

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72 What is the smallest unknown natural number? Jun 8 '15
56 A sequence that avoids both arithmetic and geometric progressions Jul 7 '14
48 Why is this coin-flipping probability problem unsolved? Oct 6 '10
48 Why are some coins Reuleaux triangles? Jun 20 '18
44 Why are there only a finite number of sporadic simple groups? Aug 14 '10
41 Why can't three unit regular triangles cover a unit square? Apr 7 '15
41 Is any mathematican more famous for their conjecture(s) than their theorem(s)? Sep 23 '16
40 Why does this process map every fraction to the golden ratio? Nov 18 '19
39 “the only odd dimensional spheres with a unique smooth structure are $S^1$, $S^3$, $S^5$, $S^{61}$” Jan 12 '16
39 What seemingly innocuous results in mathematics require advanced proofs? Aug 17 '17
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