Weak Log-Majorization for Negative Lim-Pálfia Power Means

Marco Tomamichel

For $0\le \alpha \le 1$ and $-1\le r<0$, let ${\#}_{r,\alpha }$ denote the weighted Kubo-Ando power mean of order $r$ and weight $\alpha$. Ando proved that, for every unitarily invariant norm, $\…