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Kronecker preconditioners: StiffnessPreconditioner, refactor of the mass preconditioners; bump feectools - #731

Merged

spossann merged 20 commits into

develfrom

kron-stencil-matmul

Oct 9, 2026

Merged

Kronecker preconditioners: StiffnessPreconditioner, refactor of the mass preconditioners; bump feectools#731
spossann merged 20 commits into
develfrom
kron-stencil-matmul

Commits on Oct 8, 2026
- Bump feectools: KroneckerStencilMatrix matmul and grouped factors
  
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- Refactor MassMatrixPreconditioner with helper functions
  
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  500a056
- MassMatrixPreconditioner: weight_reduction option, fixes
  
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  a19f5a2
- Use multiplicands; bump feectools (ComposedKroneckerStencilMatrix)
  
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- Merge branch 'devel' into kron-stencil-matmul
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- Bump feectools: KroneckerSumSolver, derivative properties
  
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- KroneckerPreconditioner base class for the mass preconditioners
  
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- StiffnessPreconditioner for d^T M_{k+1} d + sigma M_k (grad)
  
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- StiffnessPreconditioner: kernel correction for curl
  
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- StiffnessPreconditioner: kernel correction for div
  
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- StiffnessPreconditioner: option weights="average"
  
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- StiffnessPreconditioner: weights="average" as default
  
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- MassMatrixDiagonalPreconditioner as subclass of MassMatrixPreconditioner
  
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  b28e206
- Fix diagonal scaling for mass matrices with zero diagonal blocks
  
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  97dd117
- Bump feectools (factor row layout, periodic duplicates); diagonal offset
  
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  7839a62
- Fix diagonal placement of process-local 1d factors (small periodic dirs)
  
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- Bump feectools (merge of devel-tiny, version 0.7.0)
  
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  9204927
- update feectools devel-tiny
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  45f2a81
Commits on Oct 9, 2026
- require feectools 0.7.0 in pyproject
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  c95939d
- Merge branch 'devel' into kron-stencil-matmul
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  d519589

Commits

Commits on Oct 8, 2026

Commits on Oct 9, 2026