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Recreational mathematics or puzzles with serious mathematical content. Note that math contest problems are generally considered off-topic.

3 votes
Accepted

Moshe Rosenfeld's Salmon Problem

Ah, irony. Now that I've publicly asked the question, I practically trip over a reference. I just found this paper of Rosenfeld from 2008, which has large overlap with the talk mentioned in my origi …
Cap Khoury's user avatar
8 votes
1 answer
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Moshe Rosenfeld's Salmon Problem

As an amusement at the start of this talk, Moshe Rosenfeld poses the following question. Suppose that there are n salmon which begin at distinct points on a unit circle, each facing either clo …
Cap Khoury's user avatar