C. Kubrusly

activity

20182026

most citedAsymptotic limits, Banach limits, and Cesàro means

6 citations · 12 across the 16 of their papers we have counts for

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Showing 2019 · math.FAShow all

3 papers · 2 filters

math.FA2019

Biisometric operators and biorthogonal sequences

Carlos S. Kubrusly, Nhan Levan

It is shown that a pair of Hilbert space operators V and W such that V*W=I (called a biisometric pair) shares some common properties with unilateral shifts when orthonormal basis a…

math.FA2019★ 1 cited

Power bounded $m$ -left invertible operators

B. P. Duggal, C. S. Kubrusly

A Hilbert space operator $S\in\B$ is left $m$ -invertible by $T\in\B$ if $j = 0 \sum m (- 1)^{m - j} (m j) T^{j} S^{j} = 0,$ $S$ is $m$ -isometric if…

math.FA2019

Residual Spectrum of Power Bounded Operators

A. Mello, C. S. Kubrusly

The residual spectrum of a power bounded operator lies in the open unit disk.

Biisometric operators and biorthogonal sequences

Power bounded m-left invertible operators

Residual Spectrum of Power Bounded Operators

Power bounded $m$ -left invertible operators