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math.FA2020★ 4 cited
Joint numerical radius of spherical Aluthge transforms of tuples of Hilbert space operators
Kais Feki, Takeaki Yamazaki
Let be a -tuple of operators on a complex Hilbert space . The spherical Aluthge transform of is the -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…