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Questions
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Simultaneous decomposition of three projectors

may 29 at 8:47 Andreas Thom 13.1k●1●23●64

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how to cover a set in a grid with as few rectangles as possible

nov 11 11 at 23:11 Kevin P. Costello 2,862●9●17

 
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Can finitely many hermitian (positive-semidefinite) operators always be embedded into a small dimensional space preserving inner product?

sep 13 11 at 18:22 MathOverflow♦ 1●2●3

 
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what is the largest gap between rank and approximate rank

apr 15 11 at 4:58 Penghui Yao 158●5

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How to estimate the growth of the probability that $G(n, M)$ contains a $k$-clique

sep 14 10 at 14:22 MathOverflow♦ 1●2●3