JuliaDiff/ForwardDiff.jl

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Forward Mode Automatic Differentiation for Julia

Stars: 1k
Forks: 160
Open beginner issues: 0
Indexed issues: 128

Dominant language: Julia
License: No license data
Last GitHub push: Sep 11, 2026
Latest indexed: Sep 18, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
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PR merge metrics: No merged PRs in 30d

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128 open issues indexed

ForwardDiff causes many ambiguities which may hurt performance Open

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

JuliaDiff/ForwardDiff.jl#597 · 2 comments · 4 reactions · Opened Sep 7, 2022
confused by this root finding example Open

Difficulty 4/5 3-5 days Newbie friendliness 32/100

JuliaDiff/ForwardDiff.jl#595 · 1 comment · Opened Aug 30, 2022
jacobian with StaticArray always uses autogenerated Tag Open

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

JuliaDiff/ForwardDiff.jl#594 · Opened Aug 29, 2022
Inconsistent random numbers with some RNGs Open

Difficulty 4/5 3-5 days Newbie friendliness 32/100

JuliaDiff/ForwardDiff.jl#593 · 8 comments · Opened Aug 17, 2022
ERROR: StackOverflowError: Open

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

JuliaDiff/ForwardDiff.jl#590 · Opened Aug 3, 2022
StackOverflowError when differentiating a simple scalar function from SpecialFunctions.jl Open

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

JuliaDiff/ForwardDiff.jl#567 · 2 comments · Opened Nov 29, 2021
`NaN`s in jacobian of a function that uses a `StaticArray` and `norm` Open

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

JuliaDiff/ForwardDiff.jl#547 · 11 comments · Opened Oct 2, 2021
Relax requirement that all partials have to be of the same type Open

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

JuliaDiff/ForwardDiff.jl#546 · Opened Sep 9, 2021
missing method big(::Dual) Open

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

JuliaDiff/ForwardDiff.jl#537 · 5 comments · 1 reaction · Opened Jul 22, 2021
`InexactError` when trying to differentiate `ODEProblem` using `LabelledArrays` Open

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

JuliaDiff/ForwardDiff.jl#533 · Opened Jul 9, 2021
Forced periodicity (modulo) breaks ForwardDiff Open

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

JuliaDiff/ForwardDiff.jl#524 · 2 comments · Opened Jun 17, 2021
Error for Jacobian of in-place function that internally creates complex numbers Open

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

JuliaDiff/ForwardDiff.jl#520 · Opened Jun 6, 2021
More memory allocated after update to Julia 1.6.1 Open

Difficulty 4/5 3-5 days Newbie friendliness 32/100

JuliaDiff/ForwardDiff.jl#519 · Opened May 7, 2021
Create lightweight package AbstractDualNumbers or ForwardDiffBase or similar? Open

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

JuliaDiff/ForwardDiff.jl#518 · 14 comments · Opened May 1, 2021
Computational noise can corrupt NaN-safe computations Open

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

JuliaDiff/ForwardDiff.jl#515 · 1 comment · Opened Apr 13, 2021
StackOverflow when differentiating QuadGK Integral Open

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

JuliaDiff/ForwardDiff.jl#510 · 4 comments · Opened Mar 14, 2021
Bad compilation time with static arrays and intervals Open

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

JuliaDiff/ForwardDiff.jl#504 · 3 comments · Opened Feb 1, 2021
Support for real-valued function with complex arguments Open

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

JuliaDiff/ForwardDiff.jl#498 · 1 comment · Opened Jan 18, 2021
Plans for supporting Laplacian operator? Open

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

JuliaDiff/ForwardDiff.jl#496 · 2 comments · 8 reactions · Opened Jan 15, 2021
inaccurate derivatives of matrix logarithm Open

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

JuliaDiff/ForwardDiff.jl#494 · 1 comment · 1 reaction · Opened Jan 12, 2021
Inequality, ε-balls, and accidental structural zeros Open

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

JuliaDiff/ForwardDiff.jl#480 · 9 comments · 6 reactions · Opened Nov 27, 2020
method ambiguity in `ForwardDiff.derivative(x -> ℯ^x, 1/2)` Open

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

JuliaDiff/ForwardDiff.jl#471 · Opened Nov 5, 2020
Prohibit setindex! call if element of Jacobian is zero Open

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

JuliaDiff/ForwardDiff.jl#452 · 2 comments · Opened Apr 11, 2020
Perturbation Confusion issue Open

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

JuliaDiff/ForwardDiff.jl#443 · Opened Jan 23, 2020
seed! dimension mismatch Open

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

JuliaDiff/ForwardDiff.jl#441 · Opened Jan 21, 2020
Using ForwardDiff with a vector function (as in IntelVectorMath) Open

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

JuliaDiff/ForwardDiff.jl#440 · 3 comments · Opened Jan 21, 2020
Make SIMD testing more robust Open

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

JuliaDiff/ForwardDiff.jl#439 · Opened Jan 20, 2020
ChainRules pushforward on Partials sometimes returns Array Open

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

JuliaDiff/ForwardDiff.jl#432 · 2 comments · Opened Dec 20, 2019
Directional derivatives Open

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

JuliaDiff/ForwardDiff.jl#428 · 2 comments · Opened Dec 11, 2019
SpecialFunctions.gamma_inc goes into infinite recursion Open

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

JuliaDiff/ForwardDiff.jl#424 · 3 comments · 1 reaction · Opened Nov 26, 2019
Recommended method for creating custom derivatives / gradients using Duals? Open

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

JuliaDiff/ForwardDiff.jl#413 · 6 comments · Opened Oct 11, 2019
Special case `x^1` Open

Difficulty 1/5 Under an hour Newbie friendliness 48/100

JuliaDiff/ForwardDiff.jl#412 · 1 comment · 2 reactions · Opened Oct 9, 2019
Support for function of arbitrary type (not just <:Real) Open

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

JuliaDiff/ForwardDiff.jl#405 · 2 comments · 1 reaction · Opened Jul 10, 2019
`eps` of a `Dual` is not `Dual` Open

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

JuliaDiff/ForwardDiff.jl#396 · 1 reaction · Opened Mar 3, 2019
Nested jacobian! calls Open

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

JuliaDiff/ForwardDiff.jl#393 · 5 comments · Opened Feb 23, 2019
Simple format for value + derivative Open

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

JuliaDiff/ForwardDiff.jl#391 · 2 comments · 1 reaction · Opened Feb 19, 2019
Numerical derivative of a time dependent function defined by two arrays Open

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

JuliaDiff/ForwardDiff.jl#390 · 4 comments · Opened Feb 16, 2019
Throw a `DimensionMismatch` error instead of `MethodError` when using wrong differentiation method for function Open

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

JuliaDiff/ForwardDiff.jl#384 · 1 reaction · Opened Feb 4, 2019
Can't differentiatate through StepRangeLen due to TwicePrecision Open

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

JuliaDiff/ForwardDiff.jl#380 · 7 comments · Opened Jan 14, 2019
Type dependent default maximum chunk size. Open

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

JuliaDiff/ForwardDiff.jl#375 · 1 reaction · Opened Nov 4, 2018
ForwardDiff.jacobian does not respect Array dimensionality Open

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

JuliaDiff/ForwardDiff.jl#367 · Opened Oct 11, 2018
support for complex valued function Open

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

JuliaDiff/ForwardDiff.jl#364 · 5 comments · Opened Oct 9, 2018
Sparse backslash Open

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

JuliaDiff/ForwardDiff.jl#363 · 11 comments · Opened Oct 8, 2018
DimensionMismatch when taking hessian of vector function using DiffResults Open

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

JuliaDiff/ForwardDiff.jl#360 · 2 comments · Opened Sep 23, 2018
Supporting copysign and flipsign Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

JuliaDiff/ForwardDiff.jl#344 · Opened Aug 9, 2018
Efficient partial Hessian calculation Open

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

JuliaDiff/ForwardDiff.jl#339 · Opened Aug 4, 2018
Unitful support Open

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

JuliaDiff/ForwardDiff.jl#328 · 11 comments · 8 reactions · Opened Jul 2, 2018
StackOverflowError with complex `sqrt` Open

Difficulty 4/5 3-5 days Newbie friendliness 32/100

JuliaDiff/ForwardDiff.jl#324 · 7 comments · 1 reaction · Opened Jun 11, 2018
Parallel gradient, Cannot determine ordering of Dual tags Open

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

JuliaDiff/ForwardDiff.jl#320 · 4 comments · Opened Apr 26, 2018
Calculating J_f(x) . y efficiently Open

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

JuliaDiff/ForwardDiff.jl#319 · 10 comments · 3 reactions · Opened Apr 24, 2018

JuliaDiff/ForwardDiff.jl

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