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International Journal of Mathematics and Mathematical Sciences
Volume 9, Issue 4, Pages 659-663

Cohyponormal operators with the single valued extension property

Department of Mathematics, Central Michigan University, Mt. Pleasant 48859, Michigan, USA

Received 26 September 1985

Copyright © 1986 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


It is proved that in order to find a nontrivial hyperinvariant subspace for a cohyponormal operator it suffices to make the further assumption that the operator have the single-valued extension property.