A Taylor-like Expansion of a Commutator with a Function of Self-Adjoint, Pairwise Commuting Operators
A Taylor-like Expansion of a Commutator with a Function of Self-Adjoint, Pairwise Commuting Operators
复制标题
具有自伴、成对交换算子函数的交换器的泰勒式展开
DOI:
--
复制
发表时间:
2012
期刊:
影响因子:
--
通讯作者:
M. G. Rasmussen
中科院分区:
文献类型:
--
作者:
M. G. Rasmussen
Let $A$ be a $
u$-vector of self-adjoint, pairwise commuting operators and $B$ a bounded operator of class $C^{n_0}(A)$. We prove a Taylor-like expansion of the commutator $[B,f(A)]$ for a large class of functions $fcolonmathbf{R}^
u omathbf{R}$, generalising the one-dimensional result where $A$ is just a self-adjoint operator. This is done using almost analytic extensions and the higher-dimensional Helffer-Sjostrand formula.