Spectrum nonincreasing maps on matrices
arXiv:1210.0958
Abstract
Maps which do not increase the spectrum on complex matrices in a sense that $\Sp(Φ(A)-Φ(B))\subseteq\Sp(A-B)$ are classified.
8 pages
arXiv:1210.0958
Maps which do not increase the spectrum on complex matrices in a sense that $\Sp(Φ(A)-Φ(B))\subseteq\Sp(A-B)$ are classified.
8 pages