Sang-Hoon Lee

activity

20102020

most citedQuasinormality of powers of commuting pairs of bounded operators

28 citations · 67 across the 7 of their papers we have counts for

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Showing 2019Show all

2 papers · 1 filter

math.FA2019★ 28 cited

Quasinormality of powers of commuting pairs of bounded operators

Raul E. Curto, Sang Hoon Lee, Jasang Yoon

We study jointly quasinormal and spherically quasinormal pairs of commuting operators on Hilbert space, as well as their powers. We first prove that, up to a constant multiple, the…

math.FA2019★ 15 cited

Joint spectra of spherical Aluthge transforms of commuting n-tuples of Hilbert space operators

Chafiq Benhida, Raul E. Curto, Sang Hoon Lee +1

Let $T \equiv (T_{1}, \dots, T_{n})$ be a commuting $n$ -tuple of operators on a Hilbert space $H$ , and let $T_{i} \equiv V_{i} P (1 \leq i \leq n)$ be its canonical join…