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a note on maximal numerical range
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نویسنده
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baghdad abderrahim ,kaadoud mohamed chraibi
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منبع
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journal of mathematical extension - 2020 - دوره : 14 - شماره : 1 - صفحه:117 -126
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چکیده
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We shed some light on the pythagorean relation for operator established in [7] and we study its relationship with the maximal numerical range. we then get some informations of maximal numerical ranges of selfadjoint operators. this allows us to show, contrary tothe closure of the numerical range, the non-continuity in the sensof hausdorff of the maximal numerical range.
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کلیدواژه
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spectrum ,numerical range ,maximal numerical range ,normaloid operator
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آدرس
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cadi ayyad university, la faculté des sciences semlalia de marrakech (fssm), department of mathematics, morocco, cadi ayyad university, la faculté des sciences semlalia de marrakech (fssm), department of mathematics, morocco
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پست الکترونیکی
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chraibik@uca.ac.ma
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Authors
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