ranocha/SummationByPartsOperators.jl

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A Julia library of summation-by-parts (SBP) operators used in finite difference, Fourier pseudospectral, continuous Galerkin, and discontinuous Galerkin methods to get provably stable semidiscretizations, paying special attention to boundary conditions.

Stars: 113
Forks: 20
Open beginner issues: 0
Indexed issues: 39
Avg merge: 11h 53m
Merged PRs (30d): 7

Dominant language: Julia
License: MIT
Last GitHub push: Sep 19, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue

Beginner friendly Everything

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38 open issues indexed

New spherical operators Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

ranocha/SummationByPartsOperators.jl#430 · 3 comments · Opened Sep 17, 2026
Check whether the Uppsala MATLAB SBP library has more operators that should be included Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ranocha/SummationByPartsOperators.jl#320 · Opened Feb 5, 2025
Periodic variable-coefficient second-derivative operators Open

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

ranocha/SummationByPartsOperators.jl#258 · Opened Mar 18, 2024
Add Dissipation Operators for DienerDorbandSchnetterTiglio2007 Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ranocha/SummationByPartsOperators.jl#251 · 2 comments · Opened Feb 18, 2024
Upwind SBP-WENO operators of Jiang and Wang (2023) Open

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

ranocha/SummationByPartsOperators.jl#239 · 1 comment · Opened Dec 19, 2023
Add some tests with rationals Open

good first issue

Difficulty 3/5 1-2 days Newbie friendliness 42/100

ranocha/SummationByPartsOperators.jl#210 · Opened Aug 12, 2023
New first- and second-derivative coefficients of Sharan, Brady, Livescu (2022) Open

enhancement good first issue

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ranocha/SummationByPartsOperators.jl#203 · Opened Jul 21, 2023
New optimized second-derivative operators of Eriksson and Mattsson (2022) Open

enhancement good first issue

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

ranocha/SummationByPartsOperators.jl#173 · Opened Apr 3, 2023
New optimized variable-coefficient second-derivative operators of Stierström, Almquist, Mattsson Open

enhancement good first issue

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

ranocha/SummationByPartsOperators.jl#170 · 1 comment · Opened Mar 9, 2023
Provide non-allocating access to quadrature weights Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

ranocha/SummationByPartsOperators.jl#161 · Opened Dec 13, 2022
5-arg `mul!` for continuously coupled operators? Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ranocha/SummationByPartsOperators.jl#145 · 4 comments · Opened Aug 26, 2022
Functional (FSBP) and RBF SBP operators of Glaubitz, Nordström, Öffner (2022) Open

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

ranocha/SummationByPartsOperators.jl#132 · 3 comments · Opened Mar 11, 2022
SBP coefficients of Dovgilovich, Maksyutov, Sofronov (2017) Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ranocha/SummationByPartsOperators.jl#131 · Opened Mar 4, 2022
SBP coefficients of Albin & Klarmann (2016) Open

good first issue

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

ranocha/SummationByPartsOperators.jl#130 · Opened Mar 4, 2022
Potential cooperation and integration between DiffEqOperators and SummationByPartsOperators Open

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

ranocha/SummationByPartsOperators.jl#127 · 4 comments · Opened Mar 3, 2022
Implicit SBP operators of Mattsson and Rydin (2022) Open

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

ranocha/SummationByPartsOperators.jl#126 · Opened Mar 2, 2022
Add precompile statements Open

latency

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ranocha/SummationByPartsOperators.jl#102 · Opened May 31, 2021
More SIMD improvements Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ranocha/SummationByPartsOperators.jl#93 · Opened May 25, 2021
Upwind SBP operators of Mattsson (2017) Open

good first issue

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

ranocha/SummationByPartsOperators.jl#58 · Opened Mar 22, 2020
Periodic wavelet collocation operators Open

good first issue

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

ranocha/SummationByPartsOperators.jl#57 · Opened Mar 17, 2020
Reconstruction and filtering methods to reduce oscillations Open

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

ranocha/SummationByPartsOperators.jl#56 · 1 comment · Opened Mar 16, 2020
Finite Difference Filters Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

ranocha/SummationByPartsOperators.jl#42 · Opened Aug 19, 2019
Add operators with minimal dispersion error of Linders et al. Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

ranocha/SummationByPartsOperators.jl#38 · Opened Dec 21, 2018
Add boundary optimized operators of Mattsson, Almquist, and van der Weide Open

good first issue

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

ranocha/SummationByPartsOperators.jl#37 · 2 comments · Opened Dec 21, 2018
Provide Scalar Products Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

ranocha/SummationByPartsOperators.jl#33 · 1 comment · Opened Jun 2, 2018
Modal Filtering with Adaptive Parameters Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

ranocha/SummationByPartsOperators.jl#29 · Opened Jan 23, 2018
Unify Spectral Viscosity via Modal Filtering Open

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

ranocha/SummationByPartsOperators.jl#28 · 1 comment · Opened Jan 22, 2018
Legendre Operators: Dissipation Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

ranocha/SummationByPartsOperators.jl#24 · 1 comment · Opened Jan 19, 2018
Block-Norm SBP Operators Open

Difficulty 5/5 Over a week Newbie friendliness 10/100

ranocha/SummationByPartsOperators.jl#21 · Opened Jan 10, 2018
Multiplication with Transpose Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

ranocha/SummationByPartsOperators.jl#17 · Opened Jan 4, 2018
Optimised SBP Operators of Mattsson, Almquist, and Carpenter (2014) Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

ranocha/SummationByPartsOperators.jl#14 · 1 comment · Opened Dec 30, 2017
Vector Valued Coefficients `α, β` in `mul!` ? Open

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

ranocha/SummationByPartsOperators.jl#11 · Opened Dec 20, 2017
Batteries Included: Adevction Diffusion Equation with Different BCs Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

ranocha/SummationByPartsOperators.jl#9 · Opened Dec 20, 2017
Batteries Included: Heat Equation with Different BCs Open

Difficulty 5/5 Over a week Newbie friendliness 1/100

ranocha/SummationByPartsOperators.jl#7 · Opened Dec 20, 2017
Subtype AbstractMatrix{T} or interface with LinearMaps.jl ? Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

ranocha/SummationByPartsOperators.jl#5 · Opened Dec 19, 2017
Multiplication with Matrices Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

ranocha/SummationByPartsOperators.jl#4 · Opened Dec 19, 2017
Specialised Kronecker Products Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

ranocha/SummationByPartsOperators.jl#3 · Opened Dec 19, 2017
Implement getindex? Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

ranocha/SummationByPartsOperators.jl#2 · Opened Dec 19, 2017

ranocha/SummationByPartsOperators.jl

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