Mikhail Katz
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Last seen Jul 1 '18 at 12:49
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 97 How long will it take Marie to saw another board into 3 pieces?
 83 Is $\frac{\textrm{d}y}{\textrm{d}x}$ not a ratio?
 78 What seemingly innocuous results in mathematics require advanced proofs?
 39 Did Euler prove theorems by example?
 34 If a compact set is covered by a finite union of open balls of same radii, can we always get a lesser radius?
 33 Is there a matrix $A$ such that for every other matrix $B$, we have $\mbox{tr}(AB) = 0$?
 33 What are the advantages of the more abstract approaches to nonstandard analysis?
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