JuliaApproximation/FastTransforms.jl

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:rocket: Julia package for orthogonal polynomial transforms :snowboarder:

Stars: 281
Forks: 27
Open beginner issues: 0
Indexed issues: 41

Dominant language: Julia
License: No license data
Last GitHub push: Jul 10, 2026
Latest indexed: Sep 20, 2026
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41 issues indexed so far

Loading FastTransforms.jl can make FFTs via FFTW.jl 100x slower due to threading conflicts Open

JuliaApproximation/FastTransforms.jl#267 · 2 reactions · 2 assignees · Opened Apr 9, 2026
plan_transform fails with 3D Ultraspherical tensor product Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

JuliaApproximation/FastTransforms.jl#266 · 1 comment · Opened Feb 28, 2026
LibFastTransforms crashing in tests on 1.12 Open

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

JuliaApproximation/FastTransforms.jl#263 · 2 comments · Opened Oct 9, 2025
Unwanted sine modes appearing in convolution using FFT Open

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

JuliaApproximation/FastTransforms.jl#257 · 1 comment · Opened Jan 15, 2025
Allocating lmul! Open

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

JuliaApproximation/FastTransforms.jl#253 · 7 comments · Opened Sep 12, 2024
Can't use empty vectors in `th_cheb2leg` or `th_leg2cheb` Open

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

JuliaApproximation/FastTransforms.jl#248 · Opened Jul 21, 2024
Segmentation fault for spherical harmonic transform Open

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

JuliaApproximation/FastTransforms.jl#238 · 5 comments · Opened Dec 4, 2023
Move out forwardrecurrence and clenshaw Open

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

JuliaApproximation/FastTransforms.jl#217 · Opened Apr 4, 2023
Add multidimensional interface for lib transforms Open

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

JuliaApproximation/FastTransforms.jl#210 · 3 comments · Opened Mar 27, 2023
Use Toeplitz-dot-Hankel for very large dimensional transforms Open

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

JuliaApproximation/FastTransforms.jl#209 · 4 comments · Opened Mar 27, 2023
`cheb2ultra` seems unreasonably slow Open

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

JuliaApproximation/FastTransforms.jl#204 · 2 comments · Opened Mar 26, 2023
Add a slow path in ultra2ultra transforms? Open

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

JuliaApproximation/FastTransforms.jl#200 · Opened Mar 26, 2023
sph methods slow? Open

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

JuliaApproximation/FastTransforms.jl#191 · 5 comments · Opened Jan 29, 2023
Potentially suboptimal performance in r2r transforms? Open

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

JuliaApproximation/FastTransforms.jl#189 · 1 comment · Opened Nov 15, 2022
Move Chebyshev functionality to Chebyshevtransforms.jl Open

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

JuliaApproximation/FastTransforms.jl#186 · Opened Sep 21, 2022
jac2cheb: Crash on M1 (with Rosetta) Open

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

JuliaApproximation/FastTransforms.jl#175 · Opened Jun 6, 2022
Why are second kind Chebyshev points the first kind extrema? Open

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

JuliaApproximation/FastTransforms.jl#174 · Opened May 12, 2022
Are vector spherical harmonic transforms available? Open

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

JuliaApproximation/FastTransforms.jl#153 · 2 comments · Opened Sep 29, 2021
big chebyshevu Open

Difficulty 3/5 1-2 days Newbie friendliness 30/100

JuliaApproximation/FastTransforms.jl#145 · 3 comments · Opened Jun 25, 2021
multidimensional nufft? Open

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

JuliaApproximation/FastTransforms.jl#144 · 1 comment · Opened May 24, 2021
GPU compatibility Open

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

JuliaApproximation/FastTransforms.jl#142 · 3 comments · 1 reaction · Opened Apr 29, 2021
More documentation / examples? Open

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

JuliaApproximation/FastTransforms.jl#140 · 1 comment · Opened Mar 14, 2021
`cheb2leg(::Matrix)` should do tensor product Cheb -> tensor product Leg Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

JuliaApproximation/FastTransforms.jl#135 · 1 comment · Opened Feb 18, 2021
Allow other than `Array` in libfasttransforms calls Open

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

JuliaApproximation/FastTransforms.jl#109 · 1 comment · Opened Jul 15, 2020
Evaluation of SH/Zernike/Triangle expansions/polynomials? Open

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

JuliaApproximation/FastTransforms.jl#108 · 15 comments · Opened Jul 6, 2020
NFFTs with outputs with different size Open

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

JuliaApproximation/FastTransforms.jl#102 · Opened Apr 2, 2020
tests hang Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

JuliaApproximation/FastTransforms.jl#98 · 4 comments · Opened Dec 28, 2019
cheb2leg is slow Open

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

JuliaApproximation/FastTransforms.jl#97 · 4 comments · Opened Dec 27, 2019
How to transform from Legendre -> (1-x)^m * P_n^{2m,0} Open

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

JuliaApproximation/FastTransforms.jl#96 · 2 comments · Opened Dec 18, 2019
tests hang possibly due to type inference Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

JuliaApproximation/FastTransforms.jl#95 · 21 comments · Opened Dec 5, 2019
Validated transforms Open

beginner

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

JuliaApproximation/FastTransforms.jl#94 · Opened Nov 28, 2019
Why is there no inufft3? Open

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

JuliaApproximation/FastTransforms.jl#73 · 2 comments · Opened Jul 13, 2019
More flexible fourier transforms Open

enhancement

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

JuliaApproximation/FastTransforms.jl#54 · Opened Sep 26, 2018
Add examples folder showing full transform from points to coefficients Open

JuliaApproximation/FastTransforms.jl#47 · 7 comments · 1 assignee · Opened Jul 23, 2018
Add oscillatory integral quadratures Open

enhancement

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

JuliaApproximation/FastTransforms.jl#42 · 2 comments · Opened Jun 19, 2018
Support Bessel polynomials? Open

question

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

JuliaApproximation/FastTransforms.jl#27 · 7 comments · Opened Sep 12, 2017
Add partial Fourier transforms Open

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

JuliaApproximation/FastTransforms.jl#23 · 2 comments · Opened Jul 19, 2017
Add Fourier--Legendre transform Open

enhancement

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

JuliaApproximation/FastTransforms.jl#21 · 4 comments · Opened Jun 30, 2017
fast hermite transform? Open

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

JuliaApproximation/FastTransforms.jl#17 · 29 comments · 1 reaction · Opened Jun 9, 2017
Spherical Harmonic bugs/enhancements Open

bug enhancement

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

JuliaApproximation/FastTransforms.jl#16 · 33 comments · Opened May 18, 2017
Have `paduapts` return the data as the transpose of the current format? Open

question

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

JuliaApproximation/FastTransforms.jl#12 · 8 comments · 2 reactions · Opened Nov 16, 2016

JuliaApproximation/FastTransforms.jl

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