SciML/ExponentialUtilities.jl

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Fast and differentiable implementations of matrix exponentials, Krylov exponential matrix-vector multiplications ("expmv"), KIOPS, ExpoKit functions, and more. All your exponential needs in SciML form.

Stars: 107
Forks: 35
Open beginner issues: 0
Indexed issues: 28
Avg merge: 22h 52m
Merged PRs (30d): 11

Dominant language: Julia
License: No license data
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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28 open issues indexed

[bug] Platform-sensitive ForwardDiff Jacobian mismatch for immutable SMatrix Open

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

SciML/ExponentialUtilities.jl#269 · Opened Aug 9, 2026
QA: ExplicitImports no_implicit_imports broken — ~31 implicit names from LinearAlgebra/SparseArrays/Printf/PrecompileTools Open

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

SciML/ExponentialUtilities.jl#231 · Opened Jun 25, 2026
Re-enable downgrade tests Open

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

SciML/ExponentialUtilities.jl#208 · Opened Jan 14, 2026
expv(A*t)v is slow for A,v sparse (it's fast for v non-sparse) Open

bug

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

SciML/ExponentialUtilities.jl#187 · 1 comment · Opened Feb 24, 2025
Adaptive matrix exponential for given tolerance Open

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

SciML/ExponentialUtilities.jl#186 · Opened Jan 3, 2025
exponential!() broken for CuSparseMatrixCSC Open

bug

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

SciML/ExponentialUtilities.jl#181 · 3 comments · Opened Nov 11, 2024
cisv(t, A, b) to compute exp(im*A*t)*b for Hermitian A? Open

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

SciML/ExponentialUtilities.jl#176 · 4 comments · Opened Jul 14, 2024
expv does not work when used in NonlinearSolve.jl equations Open

bug

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

SciML/ExponentialUtilities.jl#173 · Opened Apr 2, 2024
Occasional LAPACKException(22) Open

bug

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

SciML/ExponentialUtilities.jl#171 · 1 comment · Opened Mar 26, 2024
Higher allocations using `MMatrix` and `exponential!` Open

good first issue

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

SciML/ExponentialUtilities.jl#164 · 1 comment · Opened Feb 6, 2024
Improve docstrings Open

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

SciML/ExponentialUtilities.jl#138 · Opened Sep 16, 2023
`phi!` allocates Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

SciML/ExponentialUtilities.jl#126 · 2 comments · Opened Apr 7, 2023
`exp_generic` mutates Open

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

SciML/ExponentialUtilities.jl#125 · 1 comment · Opened Mar 28, 2023
Issue with ForwardDiff.jl Open

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

SciML/ExponentialUtilities.jl#111 · 1 comment · Opened Nov 18, 2022
Performance of `phi!` on diagonal matrices Open

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

SciML/ExponentialUtilities.jl#109 · 1 comment · Opened Nov 4, 2022
GPU performance of expv and expv_timestep could maybe be improved Open

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

SciML/ExponentialUtilities.jl#102 · Opened Oct 22, 2022
More matrix exponential methods Open

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

SciML/ExponentialUtilities.jl#69 · 5 comments · 1 reaction · Opened Aug 24, 2021
Complex valued expv! gives MethodError in some cases Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

SciML/ExponentialUtilities.jl#61 · 1 comment · Opened Jul 13, 2021
Output-sensitive Lanczos iteration Open

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

SciML/ExponentialUtilities.jl#47 · 3 comments · Opened Aug 21, 2020
Avoid generated function in generic_exp Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

SciML/ExponentialUtilities.jl#41 · Opened Aug 15, 2020
Add ChainRules rules Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

SciML/ExponentialUtilities.jl#40 · 12 comments · Opened Jul 24, 2020
Generic mutating exp! Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

SciML/ExponentialUtilities.jl#35 · Opened Jun 2, 2020
Enable preconditioning Open

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

SciML/ExponentialUtilities.jl#34 · 1 comment · Opened Jun 1, 2020
Classical Gram-Schmidt with DGKS re-orthogonalization criterion Open

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

SciML/ExponentialUtilities.jl#32 · 8 comments · Opened Apr 7, 2020
Extending expv using Saad to general phiv? Open

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

SciML/ExponentialUtilities.jl#13 · 2 comments · Opened Oct 22, 2018
Add benchmarks Open

SciML/ExponentialUtilities.jl#12 · 2 comments · 1 assignee · Opened Oct 21, 2018
Other algorithms Open

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

SciML/ExponentialUtilities.jl#10 · 4 comments · Opened Oct 18, 2018
Drop `ishermitian` and `opnorm` requirement for custom operator types. Open

SciML/ExponentialUtilities.jl#8 · 1 comment · 1 assignee · Opened Oct 16, 2018

SciML/ExponentialUtilities.jl

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