English

Noncommutative functional calculate and its application

Functional Analysis 2017-12-12 v2

Abstract

In this paper we construct an unitary operator FxxF_{xx*} such that (Fxx)2=identity(F_{xx^{*}})^2=identity and Fix(Fxx)Fix(F_{xx^*})\neq\emptyset. We get the unitary equivalent representations Fxx(Mzψ(z)a)F_{xx*}(M_{z\psi(z)}-a) on L2(σ(T+a),μT+a)\mathcal{L}^{2}(\sigma(|T+a|),\mu_{|T+a|}) for any given TB(H)T\in\mathcal{B}(\mathbb{H}), where ψ(z)L(σ(T+a),μT+a)\psi(z)\in\mathcal{L}^{\infty}(\sigma(|T+a|),\mu_{|T+a|}), aρ(T)a\in\rho(T), Fxx(f(xx))=f(xx)F_{xx*}(f(xx^*))=f(x^*x), B(H)\mathcal{B}(\mathbb{H}) is the set of all bounded linear operator on complex separable Hilbert space H\mathbb{H}. Also, we get that if zψ(z)Fix(Fxx)z\psi(z)\in Fix(F_{xx^*}), then TT has a nontrivial invariant subspace space on H\mathbb{H} which has dimension >1>1. Moreover, we define the Lebesgue class BLeb(H)B(H)\mathcal{B}_{Leb}(\mathbb{H})\subset\mathcal{B}(\mathbb{H}) and get that if TT is a Lebesgue operator, then TT is Li-Yorke chaotic if and only if T1T^{*-1} is.

Keywords

Cite

@article{arxiv.1611.02981,
  title  = {Noncommutative functional calculate and its application},
  author = {Lvlin Luo},
  journal= {arXiv preprint arXiv:1611.02981},
  year   = {2017}
}

Comments

14pages. arXiv admin note: substantial text overlap with arXiv:1503.06750

R2 v1 2026-06-22T16:47:15.339Z