A-Browder's theorem and generalized a-Weyl's theorem

作者：Cao Xiao Hong^*

来源：Acta Mathematica Sinica-English Series, 2007, 23(5): 951-960.

DOI：10.1007/s10114-005-0870-4

• a-Browder's theorem
• generalized a-Weyl's theorem
• spectrum

Two variants of the essential approximate point spectrum are discussed. We find for example that if one of them coincides with the left Drazin spectrum then the generalized a-Weyl's theorem holds, and conversely for a-isoloid operators. We also study the generalized a-Weyl's theorem for Class A operators.

• 出版日期2007-5
• 单位陕西师范大学