Title of article
The semi-Fredholmness of operator matrices
Author/Authors
Hai، نويسنده , , Guojun and Chen، نويسنده , , Alatancang، نويسنده ,
Issue Information
دوهفته نامه با شماره پیاپی سال 2009
Pages
6
From page
733
To page
738
Abstract
Let H 1 and H 2 be separable infinite-dimensional Hilbert spaces, and let A ∈ B ( H 1 ) , B ∈ B ( H 2 ) and C ∈ B ( H 2 , H 1 ) be given operators. A necessary and sufficient condition is obtained for ( A C X B ) to be a right (left) Fredholm operator for some X ∈ B ( H 1 , H 2 ) .
Keywords
Right (left) essential spectrum , Operator matrices , Right (left) Fredholm operator
Journal title
Journal of Mathematical Analysis and Applications
Serial Year
2009
Journal title
Journal of Mathematical Analysis and Applications
Record number
1559851
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