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QR algorithm

Also called QR iteration, Francis QR.

Iterate A_k = Q_k R_k, then A_{k+1} = R_k Q_k, to converge to Schur form.

Iterate A_k = Q_k R_k, then A_{k+1} = R_k Q_k, to converge to Schur form.

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The build computes these levels from the evidence in the repository. Each row says what the next level needs. Read what the levels mean.

LadderLevelWhat the next level needs
Human proofH0 no proof
  • add a proof in proofs/ (06.5)
LeanL0 no Lean part
  • name a Lean module in the lean field (07)
VisualV0 none
  • add viz/scene.ts or a figure (10)
WritingW0 stub
  • the section The problem
  • pseudocode in The algorithm
  • complexity claims in the front matter
  • one source with a locator

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