%0 Journal Article
%T 2 &#215; 2上三角型算子矩阵的拟Fredholm谱<br>The Quasi-Fredholm Spectrum of 2 &#215; 2 Upper Triangular Operator Matrices
%A 包中秀
%A 吴德玉
%J Pure Mathematics
%P 151-161
%@ 2160-7605
%D 2025
%I Hans Publishing
%R 10.12677/pm.2025.154118
%X 主要运用内部项的拟Fredholm性质研究了2 &#215; 2上三角型算子矩阵的拟Fredholm谱&#65292;并拓展到无界2 &#215; 2上三角型算子矩阵的拟Fredholm谱。给出了具体例子加以说明结论的有效性。<br>The Quasi-Fredholm Spectrum of 2 &#215; 2 upper triangular operator matrices is studied by using the Quasi-Fredholm property of its internal entries, and extended to the Quasi-Fredholm spectrum of the triangular operator matrices on the unbounded 2 &#215; 2. The example is given to illustrate the validity of the result.
%K 半正则算子&#65292
%K 拟Fredholm算子&#65292
%K 算子矩阵<br>Semi-Regular Operator
%K Quasi-Fredholm Operator
%K Operator Matrices
%U http://www.hanspub.org/journal/PaperInformation.aspx?PaperID=111944