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user 20709
2
votes
Finding minimum (or maximum) element of a low rank matrix.
We can reformulate the problem as follows: given vectors $u_1,\ldots,u_n,v_1,\ldots,v_n \in \mathbb{R}^m$, find $\max | \langle u_i,v_j \rangle |$ over all $i,j \in [n]$.
Now, if an approximate answ …
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