It can be shown that finding the QR decomposition of a Hessenberg ma- trix can be done inO(N2)rather thanO(N 3)[29]

Utilizing Hessenberg Form This brings us to why so much attention has been focussed on Hessenberg form matrices

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physics.comp-ph · 2026-04-28 · unverdicted · novelty 0.0

A review of basic linear algebra methods including eigenvalue problems, Schur, QR, LU, and singular value decompositions for quantum systems.

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Basic linear algebra methods for quantum problems physics.comp-ph · 2026-04-28 · unverdicted · none · ref 7
A review of basic linear algebra methods including eigenvalue problems, Schur, QR, LU, and singular value decompositions for quantum systems.