中文

Nest代数的数大扰动

算子代数 2024-10-03 v2 泛函分析

摘要

M\mathcal{M}N\mathcal{N}是可分离希尔伯特空间上的两个nest。如果两个nest代数之间的距离小于1(d(T(M),T(N))<1d(\mathcal{T}(\mathcal{M}),\mathcal{T}(\mathcal{N})) < 1),则两个nest之间的距离小于1(d(M,N)<1d(\mathcal{M},\mathcal{N})<1)。如果两个nest之间的距离小于1,则两个nest代数相似,即存在可逆算子SS使得SM=NS\mathcal{M} = \mathcal{N},从而ST(M)S1=T(N)S \mathcal{T}(\mathcal{M})S^{-1} = \mathcal{T}(\mathcal{N})。然而存在一些距离小于1的nest,其nest代数之间的距离为1。

关键词

引用

@article{arxiv.2408.03317,
  title  = {Large Perturbations of Nest Algebras},
  author = {Kenneth R. Davidson},
  journal= {arXiv preprint arXiv:2408.03317},
  year   = {2024}
}

备注

Minor changes including a correction in the proof of Theorem 2.2. To appear in Integral Equations & Operator Theory