Linear maps preserving numerical radius of tensor product of matrices

Ajda Fošner; Zejun Huang; Chi-Kwong Li; Nung-Sing Sze

Linear maps preserving numerical radius of tensor product of matrices

Functional Analysis 2013-05-07 v2

Authors: Ajda Fošner , Zejun Huang , Chi-Kwong Li , Nung-Sing Sze

Abstract

We determine the structure of linear maps on the tensor product of matrices which preserve the numerical range or numerical radius.

Keywords

linear maps numerical radius tensor product matrices numerical range

Cite

@article{arxiv.1212.3134,
  title  = {Linear maps preserving numerical radius of tensor product of matrices},
  author = {Ajda Fošner and Zejun Huang and Chi-Kwong Li and Nung-Sing Sze},
  journal= {arXiv preprint arXiv:1212.3134},
  year   = {2013}
}