mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-10-17 12:18:23 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 9

Merge for issue #26114

Browse source
This commit is contained in:
Brett Cannon 2016-01-15 09:39:06 -08:00
commit 2f1a0b6ad5
1 changed files with 2 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

5
Modules/mathmodule.c
View file

@ -400,9 +400,8 @@ m_lgamma(double x)
Implementations of the error function erf(x) and the complementary error
function erfc(x).
Method: following 'Numerical Recipes' by Flannery, Press et. al. (2nd ed.,
Cambridge University Press), we use a series approximation for erf for
small x, and a continued fraction approximation for erfc(x) for larger x;
Method: we use a series approximation for erf for small x, and a continued
fraction approximation for erfc(x) for larger x;
combined with the relations erf(-x) = -erf(x) and erfc(x) = 1.0 - erf(x),
this gives us erf(x) and erfc(x) for all x.