On a norm inequality for a positive block-matrix
classification
🧮 math.FA
keywords
inequalitybmatrixnormpositivebeginblock-matrixcertainconditions
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For a positive semidefinite matrix $H= \begin{bmatrix} A&X\\ X^{*}&B \end{bmatrix} $, we consider the norm inequality $ ||H||\leq ||A+B|| $. We show that this inequality holds under certain conditions. Some related topics are also investigated.
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