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on higher rank numerical hulls of normal matrices
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نویسنده
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aghamollaei golamreza ,rezagholi sharifeh
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منبع
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wavelets and linear algebra - 2017 - دوره : 4 - شماره : 1 - صفحه:23 -32
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چکیده
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In this paper, some algebraic and geometrical properties of the rank-k numerical hulls of normal matrices are investigated. a characterization of normal matrices whose rank-1 numerical hulls are equal to their numerical range is given. moreover, using the extreme points of the numerical range, the higher rank numerical hulls of matrices of the form a1 ia2, where a1 and a2 are hermitian, are investigated. the higher rank numerical hulls of the basic circulant matrix are also studied.
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کلیدواژه
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rank-k numerical hulls ,basic circulant ,matrix
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آدرس
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shahid bahonar university of kerman, faculty of mathematics and computer, department of pure mathematics, ایران, payame noor university (pnu), department of mathematics, ایران
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پست الکترونیکی
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sh_rezagholi79@yahoo.com
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Authors
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