Some results on the polynomial numerical hulls of matrices
نویسندگان
چکیده مقاله:
In this note we characterize polynomial numerical hulls of matrices $A in M_n$ such that$A^2$ is Hermitian. Also, we consider normal matrices $A in M_n$ whose $k^{th}$ power are semidefinite. For such matriceswe show that $V^k(A)=sigma(A)$.
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عنوان ژورنال
دوره 39 شماره 3
صفحات 569- 578
تاریخ انتشار 2013-07-01
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