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betterment for estimates of the numerical radii of hilbert space operators
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نویسنده
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davarpanah mohammad ,moradi hamid reza
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منبع
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aut journal of mathematics and computing - 2023 - دوره : 4 - شماره : 2 - صفحه:161 -167
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چکیده
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We give several inequalities involving numerical radii ω (·) and the usual operator norm k·k of hilbert space operators. these inequalities lead to a considerable improvement in the well-known inequalities 1/2 ||t|| ≤ ω (t) ≤ ||t|| .
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کلیدواژه
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numerical radius ,usual operator norm ,inequality ,contraction operator
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آدرس
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islamic azad university, ferdows branch, department of mathematics, iran, payame noor university (pnu), department of mathematics, iran
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پست الکترونیکی
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hrmoradi@mshdiau.ac.ir
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Authors
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