Mathematics – Rings and Algebras
Scientific paper
2010-08-07
Mathematics
Rings and Algebras
8 pages
Scientific paper
Base on some simple facts of Hadamard product, characterizations of positive
definite preserving linear transformations on real symmetric matrix spaces with
an additional assumption "$\ra T(E_{ii})=1, i=1,2,..., n$" or "$T(A)>0\to A>
0$", were given.
Hieu Doan The
Nha Trang Tran Thi
Tuan Huynh Dinh
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