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Locally compact abelian groups
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Generalizing a problem to make it easier
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How to find the almost period of an exponential polynomial
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Prove: if a1,…,an are uniformly distributed unit vectors, then a1*a1‘+…+an*an’=n/2*I
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How many winning configurations can you have in a nxn Tic-Tac-Toe game where players win if a they get n/2 in either a row or column, consecutively.
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Cool problems to impress students with group theory
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Decidability of tiling R^2
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Riemann Hypothesis
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Mathematical “urban legends”
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Is there a theorem that says that there is always more than one way to “continue a finite sequence”?