T. Yamazaki

activity

20142025

most citedCartesian decomposition and Numerical radius inequalities

94 citations · 102 across the 9 of their papers we have counts for

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Showing 2015Show all

2 papers · 1 filter

math.FA2015★ 94 cited

Cartesian decomposition and Numerical radius inequalities

Fuad Kittaneh, Mohammad Sal Moslehian, Takeaki Yamazaki

We show that if $T = H + i K$ is the Cartesian decomposition of $T \in B (H)$ , then for $α, β \in R$ , $sup_{α^{2} + β^{2} = 1} ∥ α H + β K ∥ = w (T)$ . We then apply…

math.FA2015

Equivalence relations among some inequalities on operator means

Shuhei Wada, Takeaki Yamazaki

We will consider about some inequalities on operator means for more than three operators, for instance, ALM and BMP geometric means will be considered. Moreover, log-Euclidean and…