On fractional Hadamard powers of positive definite matrices*1, *2
On fractional Hadamard powers of positive definite matrices*1, *2
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关于正定矩阵*1、*2 的分数 Hadamard 幂
DOI:
10.1016/0022-247x(77)90167-6
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发表时间:
1977
影响因子:
1.3
通讯作者:
R. Horn
中科院分区:
文献类型:
--
作者:
C. FitzGerald;R. Horn
Let A = (aij) be a real symmetricn×npositive definite matrix with non-negative entries. We show that Aα≡ (aijα) is positive definite for all realα⩾n− 2. Moreover, the lower bound is sharp. We give related results for pairs of quadratic forms and discuss partial generalizations to the case in whichAis a complex Hermitian matrix.