Maximal invariant subspaces for a class of operators
Maximal invariant subspaces for a class of operators
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DOI:
10.1007/s11512-009-0109-1
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发表时间:
2010-10
期刊:
影响因子:
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通讯作者:
K. Guo;Wei He;Shengzhao Hou
中科院分区:
文献类型:
--
作者:
K. Guo;Wei He;Shengzhao Hou
In this note, we characterize maximal invariant subspaces for a class of operators. LetTbe a Fredholm operator andfor somep≥1. It is shown that ifMis an invariant subspace forTsuch that dimM⊖TM<∞, then every maximal invariant subspace ofMis of codimension 1 inM. As an immediate consequence, we obtain that ifMis a shift invariant subspace of the Bergman space and dimM⊖zM<∞, then every maximal invariant subspace ofMis of codimension 1 inM. We also apply the result to translation operators and their invariant subspaces.