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Add Schur Complement Preconditioner#67

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feature/Schurcomplement_precon
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Add Schur Complement Preconditioner#67
pjaap wants to merge 2 commits intomasterfrom
feature/Schurcomplement_precon

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@pjaap pjaap commented Feb 13, 2026

TODOs:

  • It does not really fit into the BlockPreconditioner type, since it uses a special matrix structure and different factorizations. Should this be changed?
  • The allocation-free B' A^{-1} B computation does not run in parallel: why? This is pure BLAS operations?

@pjaap pjaap marked this pull request as draft February 13, 2026 13:13
@pjaap pjaap force-pushed the feature/Schurcomplement_precon branch from 901b8d5 to e1dc366 Compare February 13, 2026 13:17
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pjaap commented Feb 13, 2026

@j-fu this works for my use case. Do you have any input for the TODOs?

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