English

Factorization properties for unbounded local positive maps

Operator Algebras 2022-04-19 v2

Abstract

In this paper we present some factorization properties for unbounded local positive maps. We show that an unbounded local positive map ϕ\phi on the minimal tensor product of the locally CC^{\ast }-algebras A\mathcal{A} and C(DE),C^{\ast }(\mathcal{D}_{\mathcal{E}}), where DE\mathcal{D}_{\mathcal{E}} is a Fr\'{e}chet quantized domain, that is dominated by φ\varphi \otimes id is of the forma ψ\psi \otimes id, where ψ\psi is an unbounded local positive map dominated by φ\varphi . As an application of this result, we show that given a local positive map φ:\varphi : A\mathcal{A}\rightarrow B,\mathcal{B}, the local positive map φ\varphi \otimes idMn(C)_{M_{n}\left( \mathbb{C}\right) } is local decomposable for some n2n\geq 2 if and only if φ\varphi is a local CPCP-map. Also, we show that an unbounded local CCPCCP-map ϕ\phi on the minimal tensor product of the unital locally CC^{\ast }-algebras A\mathcal{A} and B,\mathcal{B}, that is dominated by φψ\varphi \otimes \psi is of the forma φψ~\varphi \otimes \widetilde{\psi }, where ψ~\widetilde{\psi } is an unbounded local CCPCCP- map dominated by ψ\psi , whenever φ\varphi is pure.

Keywords

Cite

@article{arxiv.2107.12761,
  title  = {Factorization properties for unbounded local positive maps},
  author = {Maria Joiţa},
  journal= {arXiv preprint arXiv:2107.12761},
  year   = {2022}
}
R2 v1 2026-06-24T04:33:38.141Z