English

A Simple Algorithm for Constructing all Real Hessenberg Unitary Matrices

Functional Analysis 2011-11-11 v1

Abstract

Unitary matrices which are zero below the secondary diagonal (Hessenberg unitary matrices) have many uses in analysis. Given a set of needed conditions on a unitary matrix, this algorithm will give the sparsest unitary matrix. We give an algorithm for constructing all real Hessenberg unitary matrices. The n×nn\times n unitary matrices given by the algorithm have n1n-1 variables which can be chosen to give additional properties needed for a particular application.

Keywords

Cite

@article{arxiv.1111.2435,
  title  = {A Simple Algorithm for Constructing all Real Hessenberg Unitary Matrices},
  author = {Janet C. Tremain},
  journal= {arXiv preprint arXiv:1111.2435},
  year   = {2011}
}
R2 v1 2026-06-21T19:33:56.961Z