T. Yamazaki

activity

20182025

most citedJoint numerical radius of spherical Aluthge transforms of tuples of Hilbert space operators

4 citations · 5 across the 4 of their papers we have counts for

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Showing 2020 · math.FAShow all

2 papers · 2 filters

math.FA2020★ 4 cited

Joint numerical radius of spherical Aluthge transforms of tuples of Hilbert space operators

Kais Feki, Takeaki Yamazaki

Let $T = (T_{1}, \dots, T_{d})$ be a $d$ -tuple of operators on a complex Hilbert space $H$ . The spherical Aluthge transform of $T$ is the $d$ -tuple given by $\…

math.FA2020★ 1 cited

A generalization of the Aluthge transformation in the viewpoint of operator means

Takeaki Yamazaki

The Aluthge transformation is generalized in the viewpoint of the axiom of operator means by using double operator integrals. It includes the mean transformation which is defined b…