Computing p-summing norms with few vectors
William B. Johnson, Gideon Schechtman
Abstract
It is shown that the p-summing norm of any operator with n-dimensional domain can be well-aproximated using only ``few" vectors in the definition of the p-summing norm. Except for constants independent of n and log n factors, ``few" means n if 1<p<2 and np/2 if 2<p<infinity.
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