%0 Journal Article
%T Uniqueness of a convex sum of products of projectors
%A K. A. Kirkpatrick
%J Mathematics
%D 2001
%I arXiv
%R 10.1063/1.1423764
%X Relative to a given factoring of the Hilbert space, the decomposition of an operator into a convex sum of products over sets of distinct 1-projectors, one set linearly independent, is unique.
%U http://arxiv.org/abs/quant-ph/0104093v2