Article ID Journal Published Year Pages File Type
4620541 Journal of Mathematical Analysis and Applications 2009 9 Pages PDF
Abstract

In this paper, we employ the model theory due to C. Foias and C. Pearcy and the notion of Enflo's extremal vectors of quasinilpotent operators to study the hyperinvariant subspace problem for quasinilpotent operators. Our main result is that if a quasinilpotent quasiaffinity T has a sequence of “c-eigenvectors” xn of TnT∗n such that the set is compact, then T has a nontrivial hyperinvariant subspace.

Related Topics
Physical Sciences and Engineering Mathematics Analysis