We give the best possible bound from below in the Loewner ordering for the Hadamard product A circle B in terms of a multiple of A when A is positive semidefinite nonzero and B is positive definite.
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页码:179 / 182
页数:4
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Horn R. A., 1990, PROC S APPL MATH, V40, P87, DOI [DOI 10.1090/PSAPM/040/1059485, 10.1090/psapm/040/1059485]