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        線性算子的拓撲一致降標性質(zhì)與(UWΠ)性質(zhì)

        2023-04-29 00:00:00張騰杰曹小紅

        摘要: 利用拓撲一致降標性質(zhì)定義的譜集、 常用譜集和算子本身的一些性質(zhì), 給出有界線性算子及其算子函數(shù)滿足(UWΠ)性質(zhì)的充要條件, 并討論(UWΠ)性質(zhì)的攝動問題.

        關(guān)鍵詞: 線性算子; (UWΠ)性質(zhì); 拓撲一致降標; 譜

        中圖分類號: O177.2 文獻標志碼: A 文章編號: 1671-5489(2023)04-0815-08

        Topological Uniform Descent Property andProperty (UWΠ) for Linear Operators

        ZHANG Tengjie, CAO Xiaohong

        (College of Mathematics and Statistics, Shaanxi Normal University, Xi’an 710119, China)

        Abstract: We" gave necessary and sufficient conditions for bounded linear operators and their operator functions to satisfy the property

        (UWΠ) by using the spectrum sets defined by topological uniform descent property, commonly used spectrum sets and some properties of operators themselves, and discussed" the perturbation problems of property (UWΠ).

        Keywords: linear operator; property (UWΠ); topological uniform descent; spectrum

        參考文獻

        [1]BERKANI M, KACHAD M. New Browder and Weyl Type Theorems [J]. Bulletin of the Korean Mathematical Society, 2015, 52(2): 439-452.

        [2]GRABINER S. Uniform Ascent and Descent of Bounded Operators [J]. Journal of the Mathematical Society of Japan, 1982, 34(2): 317-337.

        [3]WEYL H V. ber Beschrnkte Quadratische Formen, Deren Differenz Vollstetig Ist [J]. Rendiconti Del Circolo Matematico Di Palermo, 1909, 27(1): 373-392.

        [4]GUPTA A, KUMAR A. Property (UWΠ) and Perturbations [J]. Mediterranean Journal of Mathematics, 2019, 16(5): 124-1-124-12.

        [5]AIENA P, KACHAD M. Property (UWΠ) under Perturbations [J]. Annals of Functional Analysis, 2020, 11(1): 29-46.

        [6]CAO X H. Topological Uniform Descent and Weyl Type Theorem [J]. Linear Algebra and Its Applications, 2007, 420(1): 175-182.

        [7]LI C G, ZHU S, FENG Y L. Weyl’s Theorem for Functions of Operators and Approximation [J]. Integral Equations and Operator Theory, 2010, 67(4): 481-497.

        [8]YANG L L, CAO X H. Single-Valued Extension Property and Property (ω) [J]. Functional Analysis and Its Applications, 2021, 55(4): 316-325.

        [9]YANG L L, CAO X H. Property (ω) and Its Compact Perturbations [J]. Revista De la Real Academia De Ciencias Exactas, Físicas y Naturales (Serie A): Matemticas, 2021, 115(2): 60-1-60-11.

        [10]CAO X H, DONG J, LIU J H. Weyl’s Theorem and Its Perturbations for the Functions of Operators [J]. Operators and Matrices, 2018, 12(4): 1145-1157.

        [11]AIENA P. Semi-Fredholm Operators, Perturbation Theory and Localizated SVEP [M]. Mérida, Venezuela: [s.n.], 2007: 135.

        [12]TAYLOR A E. Theorems on Ascent, Descent, Nullity and Defect of Linear Operators [J]. Mathematische Annalen, 1966, 163: 18-49.

        (責(zé)任編輯: 趙立芹)

        收稿日期: 2022-09-15.

        第一作者簡介: 張騰杰(1999—), 男, 漢族, 碩士研究生, 從事算子理論的研究, E-mail: zhangtengjie123@163.com.

        通信作者簡介: 曹小紅(1972—), 女, 漢族, 博士, 教授, 博士生導(dǎo)師, 從事算子理論的研究, E-mail: xiaohongcao@snnu.edu.cn.

        基金項目: 陜西省自然科學(xué)基金(批準號: 2021JM-519).

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