RallypointOne/MatrixFreeOperators.jl

Stars: 2
Forks: 1
Open beginner issues: 0
Indexed issues: 27
Avg merge: 5d 1h
Merged PRs (30d): 12

Dominant language: Julia
License: MIT
Last GitHub push: Sep 11, 2026
Latest indexed: Sep 20, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

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27 open issues indexed

perf(amr): source-centric transposed CSR for the coarse–fine fill adjoint Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 45/100

RallypointOne/MatrixFreeOperators.jl#94 · Opened Sep 10, 2026
perf(forest): thread the reference BlockForest path — leaf sweeps and exchange descriptor loops Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 48/100

RallypointOne/MatrixFreeOperators.jl#83 · Opened Sep 9, 2026
meta(ad): Enzyme custom-rule coverage — operator pullbacks, rule-body constraints, GPU parity Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

RallypointOne/MatrixFreeOperators.jl#82 · Opened Sep 9, 2026
meta(sciml): expose prepared operators to the SciML integrator stack Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

RallypointOne/MatrixFreeOperators.jl#81 · 1 comment · Opened Sep 9, 2026
meta(grids): non-box domains and richer boundary conditions — geometry seam, mask, Robin, tensor diffusion Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

RallypointOne/MatrixFreeOperators.jl#80 · Opened Sep 9, 2026
meta(distributed): multi-node and multi-GPU execution — backend API, IGG halo, tests, slab adjoint Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

RallypointOne/MatrixFreeOperators.jl#79 · Opened Sep 9, 2026
perf(amr): batch the coarse-fine flux rewrite into one device launch for packed Diffusion Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 52/100

RallypointOne/MatrixFreeOperators.jl#78 · Opened Sep 8, 2026
feat(sciml): expose operators as (Split)ODEFunction and search integrators per model Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 28/100

RallypointOne/MatrixFreeOperators.jl#73 · Opened Aug 14, 2026
feat(amr): regrid cadence + buffer zone so a forest can be reused across timesteps Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 48/100

RallypointOne/MatrixFreeOperators.jl#72 · Opened Aug 14, 2026
Investigate whether the matrix-free operator algebra extends to discontinuous Galerkin Open

enhancement question

Difficulty 5/5 Over a week Newbie friendliness 35/100

RallypointOne/MatrixFreeOperators.jl#71 · 1 comment · Opened Aug 14, 2026
feat(operators): anisotropic diffusion ∇·(D∇u) with a full tensor D Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 45/100

RallypointOne/MatrixFreeOperators.jl#70 · 1 comment · Opened Aug 14, 2026
feat(grids): finite differences on non-trivial geometry — pick the seam Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

RallypointOne/MatrixFreeOperators.jl#69 · 1 comment · Opened Aug 14, 2026
feat(sciml): build the planned SciMLOperators jac_prototype adapter (DESIGN §7) Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 55/100

RallypointOne/MatrixFreeOperators.jl#65 · Opened Aug 14, 2026
feat(operators): stacked multi-field operator with cross-component coupling Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

RallypointOne/MatrixFreeOperators.jl#63 · 1 comment · Opened Aug 14, 2026
feat(boundaries): Robin BC (a·u + b·∂u/∂n = c) Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 45/100

RallypointOne/MatrixFreeOperators.jl#62 · 1 comment · Opened Aug 14, 2026
feat(grids): active-cell mask so stencil operators can skip inactive cells Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 38/100

RallypointOne/MatrixFreeOperators.jl#61 · 1 comment · Opened Aug 14, 2026
feat(fv): add conservative finite-volume operators without sacrificing matrix-free AMR Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

RallypointOne/MatrixFreeOperators.jl#54 · 2 comments · Opened Aug 13, 2026
Investigate a Symbolics.jl-first operator architecture Open

question

Difficulty 5/5 Over a week Newbie friendliness 25/100

RallypointOne/MatrixFreeOperators.jl#53 · Opened Aug 13, 2026
perf(algebra): constant-fold affine time-step operators (α·I + β·Laplacian) into one stencil pass Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 48/100

RallypointOne/MatrixFreeOperators.jl#52 · Opened Aug 12, 2026
meta(cpu): CPU apply! path is single-threaded — Julia threads give zero speedup Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

RallypointOne/MatrixFreeOperators.jl#51 · 1 comment · Opened Aug 12, 2026
meta(amr): forest performance — the coarse–fine exchange, not regridding, is the AMR tax Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

RallypointOne/MatrixFreeOperators.jl#49 · Opened Aug 4, 2026
feat(api): explicit distributed-backend selection (MDLABackend / IGGBackend), mirroring AbstractJVPBackend Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

RallypointOne/MatrixFreeOperators.jl#47 · Opened Aug 3, 2026
feat(distributed): ImplicitGlobalGrid halo backend for multi-node CartesianGrid Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

RallypointOne/MatrixFreeOperators.jl#46 · 2 comments · Opened Aug 3, 2026
test(ad): GPU/packed-field AD parity for the exchange rules Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 48/100

RallypointOne/MatrixFreeOperators.jl#43 · Opened Jul 31, 2026
feat(ad): linear-operator pullback rules (DESIGN §6) — re-verify against current Enzyme Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

RallypointOne/MatrixFreeOperators.jl#41 · Opened Jul 31, 2026
fix(ad): Enzyme rule on single-grid apply_bc! segfaults on Linux x86_64 Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 38/100

RallypointOne/MatrixFreeOperators.jl#40 · Opened Jul 31, 2026
test(ci): officially instantiate test/multigpu (>=3-GPU distributed tests) Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 48/100

RallypointOne/MatrixFreeOperators.jl#30 · 1 comment · Opened Jul 22, 2026

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