E. Timko

activity

20162021

most citedThe Taylor joint spectrum and restriction to hyperinvariant subspaces

1 citations · 1 across the 3 of their papers we have counts for

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6 papers · 1 filter

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 $A_{0}$ on a Hilbert $H$ , if $M \subset H$ is hyperinvariant for $A_{0}$ , 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 $K$ on the unit ball determines a class of operators on Hilbert space called $K$ -contractions. We study those $K$ -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…

math.FA2018

Cyclic row contractions and rigidity of invariant subspaces

Raphaël Clouâtre, Edward J. Timko

It is known that pure row contractions with one-dimensional defect spaces can be classified up to unitary equivalence by compressions of the standard $d$ -shift acting on the full F…

math.FA2017

A classification of $n$ -tuples of commuting shifts of finite multiplicity

Edward J Timko

Let $V$ denote an $n$ -tuple of shifts of finite multiplicity, and denote by $Ann (V)$ the ideal consisting of polynomials $p$ in $n$ complex variables suc…

math.FA2016

On polynomial $n$ -tuples of commuting isometries

Edward J. Timko

We extend some of the results of Agler, Knese, and McCarthy [1] to $n$ -tuples of commuting isometries for $n > 2$ . Let $V = (V_{1}, \dots, V_{n})$ be an $n$ -tuple of a commuting iso…

The Taylor joint spectrum and restriction to hyperinvariant subspaces

Localizable points in the support of a multiplier ideal and spectra of constrained operators

Row contractions annihilated by interpolating vanishing ideals

Cyclic row contractions and rigidity of invariant subspaces

A classification of n-tuples of commuting shifts of finite multiplicity

On polynomial n-tuples of commuting isometries

A classification of $n$ -tuples of commuting shifts of finite multiplicity

On polynomial $n$ -tuples of commuting isometries