کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5775226 | 1413578 | 2017 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Simultaneous zero inclusion property for spatial numerical ranges
ترجمه فارسی عنوان
همزمان صفر ورودی برای محدوده عددی فضایی
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کلمات کلیدی
محدوده عددی فضایی،
موضوعات مرتبط
مهندسی و علوم پایه
ریاضیات
آنالیز ریاضی
چکیده انگلیسی
For a finite dimensional complex normed space X, we say that it has the simultaneous zero inclusion property if an invertible linear operator S on X has zero in its spatial numerical range if and only if zero is in the spatial numerical range of the inverse Sâ1, as well. We show that beside Hilbert spaces there are some other normed spaces with this property. On the other hand, space â1(n) does not have this property. Since not every normed space has the simultaneous zero inclusion property, we explore the class of invertible operators at which this property holds. In the end, we consider a property which is stronger than the simultaneous zero inclusion property and is related to the question when it is possible, for every invertible operator S, to control the distance of 0 to the spatial numerical range of Sâ1 by the distance of 0 to the spatial numerical range of S.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Mathematical Analysis and Applications - Volume 449, Issue 2, 15 May 2017, Pages 1413-1423
Journal: Journal of Mathematical Analysis and Applications - Volume 449, Issue 2, 15 May 2017, Pages 1413-1423
نویسندگان
J. BraÄiÄ, C. Diogo,