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Motivated by problems from compressed sensing, we determine the thresholdbehavior of a random $n\times d$ $\pm 1$ matrix $M_{n,d}$ with respect to theproperty "every $s$ columns are linearly independent". In particular, we showthat for every $0<\delta <1$ and $s=(1-\delta)n$, if $d\leqn^{1+1/2(1-\delta)-o(1)}$ then with high probability every $s$ columns of$M_{n,d}$ are linearly independent, and if $d\geq n^{1+1/2(1-\delta)+o(1)}$then with high probability there are some $s$ linearly dependent columns.

Sparse recovery properties of discrete random matrices