J. B. Farforovskaja, “Estimate of <nobr>$\|f(A_1, A_2)-f(B_1, B_2)\|$</nobr> for a couple of selfadjoint commuting operators.”, Zap. Nauchn. Sem. LOMI, 1984, Volume 135,Pages <nobr>175

Estimate of $\|f(A_1, A_2)-f(B_1, B_2)\|$ for a couple of selfadjoint commuting operators.

J. B. Farforovskaja

Abstract: The estimate $\|f(A_1, A_2)-f(B_1, B_2)\|\leqslant C(\log K+4)^3(\|A_1-B_1\|+\|A_2-B_2\|)$ is announced. The proof is outlined.

UDC: 513.88