Author： Yopp David A.
Publisher： Taylor & Francis Ltd
ISSN： 0308-1087
Source： Linear and Multilinear Algebra, Vol.53, Iss.3, 2005-06, pp. : 167-174
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Abstract
We show that for a matrix A of size n × m , the maps are extremals of the cone of positive maps acting . When the rank of A equals 1 or m (in which case, necessarily m = n ), we show that these extremals are exposed.
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