emsr/cxx_math

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C++ special math functions

Stars: 17
Forks: 3
Open beginner issues: 0
Indexed issues: 55

Dominant language: C++
License: GPL-3.0
Last GitHub push: May 8, 2026
Latest indexed: Sep 15, 2026
Contributing guide: No contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted
PR merge metrics: No merged PRs in 30d

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55 open issues indexed

__riemann_zeta_alt should be tested with vanWijnGaarden Open

enhancement

emsr/cxx_math#3 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Test asymptotic Hermite polys and fix them up. Open

bug enhancement help wanted

emsr/cxx_math#5 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Thrash long double testing! Open

enhancement testing

emsr/cxx_math#8 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Thrash float testing! Open

enhancement testing

emsr/cxx_math#9 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Implement inverse erf and erfc. Open

enhancement help wanted

emsr/cxx_math#17 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Implement inverse incomplete gammas. Open

enhancement help wanted

emsr/cxx_math#18 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Finish experfc = exp(x*x)*erfc(x) Open

enhancement help wanted

emsr/cxx_math#28 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
In test_riemann_zeta the negative argument differences between real zetac an zeta are much worse Open

bug help wanted

emsr/cxx_math#41 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Recursion may be bad in expint_en Open

question

emsr/cxx_math#42 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Gather 32-digit spot checks from Wolfram Open

help wanted testing

emsr/cxx_math#43 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Bessel function under/overflow near the origin - esp float. Open

bug help wanted

emsr/cxx_math#45 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Add a state for Fock-airy functions and use it Open

emsr/cxx_math#47 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Will a generic numeric_limits.h work for __float128? Open

enhancement help wanted question

emsr/cxx_math#48 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
test_hankel crashes Open

bug testing

emsr/cxx_math#53 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Auto generate check_nan.cc and compile.cc Open

enhancement help wanted testing

emsr/cxx_math#54 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Do Horner's rule on polynomial Hypergeometric functions. Open

enhancement question

emsr/cxx_math#55 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Do multi-precision compares Open

emsr/cxx_math#56 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Look for places where you can calculate max_iter and do it Open

emsr/cxx_math#57 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Have default tail function types - provide _ZeroTail and maybe _InfTail Open

emsr/cxx_math#59 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Make 2D color plots of the Hurwitz zeta function (complex) Open

enhancement help wanted plotting

emsr/cxx_math#61 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Make test_inv_ibeta.cpp work Open

bug enhancement testing

emsr/cxx_math#63 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Make test_kelvin.cpp work Open

bug enhancement testing

emsr/cxx_math#64 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Make test_bessel_iter.cpp work Open

bug enhancement testing

emsr/cxx_math#66 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Make test_little_airy.cpp work Open

bug enhancement testing

emsr/cxx_math#68 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Make test_hankel.cpp work Open

bug enhancement testing

emsr/cxx_math#70 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Running test_hankel.cpp runs out of terms Open

bug testing

emsr/cxx_math#71 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Finish test_gamma_ratio.cpp Open

enhancement help wanted testing

emsr/cxx_math#72 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
In test_dawson is there a better way to build those arrays at compile time? Open

bug

emsr/cxx_math#74 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Crash in test_kelvin.cpp Open

bug help wanted

emsr/cxx_math#77 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Bad numbers in test_airy.cpp Open

bug testing

emsr/cxx_math#78 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Modernize hankel_transition.cpp with new structs. Open

emsr/cxx_math#79 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Figure out maxint (test_maxint.cpp) and deliver it with numeric_limits.h Open

enhancement

emsr/cxx_math#92 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Put a more extensive deathmatch tests everywhere Open

enhancement help wanted testing

emsr/cxx_math#95 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Learn how to plot even in log space and use it to pick up details in polylog Open

enhancement help wanted plotting

emsr/cxx_math#114 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Find expansions of zeta near tabulated values Open

enhancement help wanted

emsr/cxx_math#116 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Make bernoulli numbers with mpreal work Open

emsr/cxx_math#126 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Offer factorials and other integer numbers as unsigned long, etc. Open

emsr/cxx_math#128 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Return state from combinatorial numbers which will be more useful Open

bug enhancement help wanted

emsr/cxx_math#132 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Consider specfun states to have a separate param type that would have the (true) Wronskian? Open

enhancement

emsr/cxx_math#133 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
All the orthogonal polynomials should return states with both value and derivative Open

enhancement help wanted

emsr/cxx_math#134 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Design a set of free functions which generate polynomials like exp_n, log, etc. Open

enhancement help wanted question

emsr/cxx_math#137 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Use a cubic routine to solve the Weierstrass cubic for the lattice roots in sf_theta Open

emsr/cxx_math#140 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Try multi-word tables of factorials Open

enhancement help wanted

emsr/cxx_math#144 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Look at phi vs u in terms of types in the elliptic functions w.r.t. type Open

enhancement question

emsr/cxx_math#147 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Ship Terminator and AsympTerminator Open

enhancement

emsr/cxx_math#149 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Make the generalized Steed programme work Open

enhancement help wanted

emsr/cxx_math#151 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
The special function states should offer deriv2() for 2nd derivative Open

enhancement help wanted

emsr/cxx_math#152 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Get polygamma reflection to work in the laboratory even if I don't use it. Open

enhancement help wanted

emsr/cxx_math#158 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
test_fermi_dirac blows up aound 4 for double, long double. Open

bug help wanted

emsr/cxx_math#160 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Make fp_complex_promote that complexifies fp_promote. Open

emsr/cxx_math#164 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026

emsr/cxx_math

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