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math.FA2020★ 1 cited
Reducing subspaces of contractions
Chafiq Benhida, Emmanuel Fricain, Dan Timotin
Using the Sz.-Nagy--Foias theory of contractions, we obtain general results about reducibility for a class of completely nonunitary contractions. These are applied to certain trunc…
math.FA2020
The invariant subspaces of
Dan Timotin
Using the tools of Sz.-Nagy--Foias theory of contractions, we describe in detail the invariant subspaces of the operator , where is the unilateral shift on a H…