Shuhei Wada

activity

20182025

most citedGeometric convexity of an operator mean

2 citations · 2 across the 5 of their papers we have counts for

collaborators

Showing 2019Show all

3 papers · 1 filter

math.FA2019

Functions preserving operator means

Trung Hoa Dinh, Hiroyuki Osaka, Shuhei Wada

Let $σ$ be a non-trivial operator mean in the sense of Kubo and Ando, and let $O M_{+}^{1}$ the set of normalized positive operator monotone functions on $(0, \infty)$ . In this paper, w…

math.FA2019

Ando-Hiai type inequalities for operator means and operator perspectives

Fumio Hiai, Yuki Seo, Shuhei Wada

We improve the existing Ando-Hiai inequalities for operator means and present new ones for operator perspectives in several ways. We also provide the operator perspective version o…

math.FA2019★ 2 cited

Geometric convexity of an operator mean

Shuhei Wada

Let $σ$ be an operator mean in the sense of Kubo and Ando. If the representation function $f$ of $σ$ satisfies $f_{σ} (t)^{p} \leq f_{σ} (t^{p}) for all p > 1,$ then the operator mean i…