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math.FA2019★ 1 cited
The Taylor joint spectrum and restriction to hyperinvariant subspaces
Edward J. Timko
It is well known that for a single bounded operator on a Hilbert , if is hyperinvariant for , then the spectrum of $A_0|…
math.FA2019
Localizable points in the support of a multiplier ideal and spectra of constrained operators
Raphaël Clouâtre, Edward J. Timko
A unitarily invariant, complete Nevanlinna--Pick kernel on the unit ball determines a class of operators on Hilbert space called -contractions. We study those -contractio…
math.FA2019
Row contractions annihilated by interpolating vanishing ideals
Raphaël Clouâtre, Edward J. Timko
We study similarity classes of commuting row contractions annihilated by what we call higher order vanishing ideals of interpolating sequences. Our main result exhibits a Jordan-ty…