English

Representation and normality of $\ast$-paranormal absolutely norm attaining operators

Functional Analysis 2022-03-29 v1

Abstract

In this article, we give a representation of \ast-paranormal absolutely norm attaining operator. Explicitly saying, every \ast-paranormal absolutely norm attaining (AN\mathcal{AN} in short) TT can be decomposed as UDU\oplus D, where UU is a direct sum of scalar multiple of unitary operators and DD is a 2×22\times 2 upper diagonal operator matrix. By the representation it is clear that the class of \ast-paranormal AN\mathcal{AN}-operators is bigger than the class of normal AN\mathcal{AN}-operators but here we observe that a \ast-paranormal AN\mathcal{AN}-operator is normal if either it is invertible or dimension of its null space is same as dimension of null space of its adjoint.

Keywords

Cite

@article{arxiv.2203.14021,
  title  = {Representation and normality of $\ast$-paranormal absolutely norm attaining operators},
  author = {Neeru Bala},
  journal= {arXiv preprint arXiv:2203.14021},
  year   = {2022}
}