Issue #26114: Remove mention of 'Numerical Recipes'.
diff --git a/Modules/mathmodule.c b/Modules/mathmodule.c
index 670e52d..01ed36b 100644
--- a/Modules/mathmodule.c
+++ b/Modules/mathmodule.c
@@ -379,9 +379,8 @@
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.