DCG
2000
13 years 4 months ago
2000
Let A be a (d + 1)
APPROX
2006
Springer
13 years 8 months ago
2006
Springer
We prove that any real matrix A contains a subset of at most 4k/ + 2k log(k + 1) rows whose span "contains" a matrix of rank at most k with error only (1 + ) times the er...