astrolabe:hessenberg-digraphsall entries

Digraphs of real-orthogonal upper Hessenberg matrices

Xinze Li, Simone Severini

Abstract:

Which directed graphs arise as the zero / non-zero pattern of an orthogonal upper Hessenberg matrix — and why the answer is a subset of $\{1, \dots, n-1\}$ .

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Comments:: 3 sections · 22 statements
Subjects:: linear-algebra digraphs hessenberg
Repository:: simoneseverini/Digraphs-of-Real-Orthogonal-Upper-Hessenberg-Matrices

Submission history

[v1]August 3, 2026source