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feat: [linalg] add iterative solvers#994

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jalvesz wants to merge 48 commits intofortran-lang:masterfortran-lang/stdlib:masterfrom

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Commits on Mar 2, 2025

• start iterative solvers

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Commits on Mar 3, 2025

• simplify workspace

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Commits on Mar 8, 2025

• add pccg solver and example

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• Merge branch 'fortran-lang:master' into iterative

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Commits on Mar 28, 2025

• Merge branch 'fortran-lang:master' into iterative

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Commits on Apr 8, 2025

• Merge branch 'fortran-lang:master' into iterative

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Commits on Apr 15, 2025

• Merge branch 'fortran-lang:master' into iterative

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Commits on Apr 21, 2025

• complete cg with dirichlet flag, add example, fix di filter

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Commits on Apr 22, 2025

• Merge branch 'fortran-lang:master' into iterative

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Commits on Apr 23, 2025

• add other sparse matrices

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• add example for custom solver extending the generic interface

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• Merge branch 'iterative' of https://github.com/jalvesz/stdlib into iterative

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Commits on Apr 25, 2025

• small simplifications for working data

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• make default inner_product point to a default dot_product add enum for workspace sizes

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• make preconditionner a linop

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• use facility size

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Commits on Apr 26, 2025

• Add a customizable logger facility, change linop matvec to apply

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• change internal procedure names for custom example

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• refactor to remove hard dependency on dirichlet BCs

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Commits on Apr 28, 2025

• add forward/backward solvers for preconditionning

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Commits on Apr 29, 2025

• fix solve forward/backward

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• Merge branch 'fortran-lang:master' into iterative

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Commits on Apr 30, 2025

• fix colum index

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• Merge branch 'iterative' of https://github.com/jalvesz/stdlib into iterative

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• add preconditionners

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Commits on May 1, 2025

• fix cmake

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• add factorizations

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• backward solve to use Lt marix

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• start unit testing

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Commits on May 5, 2025

• review csr factorization

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• change name generic for kernel

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Commits on May 9, 2025

• Merge branch 'fortran-lang:master' into iterative

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Commits on May 10, 2025

• shorten factorization procedures names

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Commits on May 16, 2025

• Merge branch 'fortran-lang:master' into iterative

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Commits on May 17, 2025

• change precond ldl name

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Commits on May 18, 2025

• rename to pcg

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• Merge branch 'iterative' of https://github.com/jalvesz/stdlib into iterative

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Commits on May 23, 2025

• Merge branch 'fortran-lang:master' into iterative

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Commits on May 25, 2025

• start working on the documentation

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Commits on May 26, 2025

• clean docstrings

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• add cg and pcg tests

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Commits on May 28, 2025

• Update example/linalg/example_solve_cg.f90

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• add _type suffix

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• reduce PR scope

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• rename wksp size constants

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• rename constant

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Commits on May 30, 2025

• Merge branch 'fortran-lang:master' into iterative

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Commits on Jun 2, 2025

• Merge branch 'fortran-lang:master' into iterative

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