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Use 5-argument mul! #353

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6 of 20 tasks
amontoison opened this issue Jun 21, 2021 · 1 comment
Closed
6 of 20 tasks

Use 5-argument mul! #353

amontoison opened this issue Jun 21, 2021 · 1 comment
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@amontoison
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amontoison commented Jun 21, 2021 •
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All Krylov processes can use 5-argument mul!. We should update our Krylov methods to reduce memory requirements.

Lanczos process

  • SYMMLQ
  • CG-LANCZOS
  • MINRES
  • MINRES-QLP

Arnoldi process

  • DIOM
  • DQGMRES

Orthogonal tridiagonalization process

  • USYMLQ
  • USYMQR
  • TRICG
  • TRIMR
  • TRILQR

Lanczos biorthogonalization process

  • BILQ
  • QMR
  • BILQR

Golub-Kahan process

  • LSLQ
  • LSQR
  • LSMR
  • LNLQ
  • CRAIG
  • CRAIGMR

Some methods are not concerned by this modification : CG, CR, CGS, BICGSTAB, CGLS, CRLS, CGNE and CRMR.
This was referenced Jun 25, 2021
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@dpo dpo added the enhancement label Jun 3, 2022
@amontoison
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Too complex to support with linear operators and preconditioners.

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@dpo @amontoison