On the group of linear preservers of the Gau-Wu number

A. Guterman, E. Shen, I. Spitkovsky

Research output: Contribution to journalArticlepeer-review

Abstract

The Gau-Wu number is an important matrix invariant describing the geometry of the numerical range. In this work, the group of non-singular linear preservers of the Gau-Wu number is completely characterized.

Original languageEnglish
Pages (from-to)1-25
Number of pages25
JournalLinear Algebra and Its Applications
Volume700
DOIs
StatePublished - 1 Nov 2024

Bibliographical note

Publisher Copyright:
© 2024 Elsevier Inc.

Keywords

  • Gau-Wu number
  • Linear preservers
  • Matrices

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