From 933965916b34a17fa77c413dbc23699e26eaa9bf Mon Sep 17 00:00:00 2001 From: Richard Kreckel Date: Fri, 19 Jun 2020 13:34:07 +0200 Subject: [PATCH] Revert "Improve diff(abs(x)) for real x." This reverts commit fa1ffcfdc9da97a6fb7cc2c9c36fe1fc45c808a9. --- ginac/inifcns.cpp | 2 -- 1 file changed, 2 deletions(-) diff --git a/ginac/inifcns.cpp b/ginac/inifcns.cpp index ec74a435..d68afbb5 100644 --- a/ginac/inifcns.cpp +++ b/ginac/inifcns.cpp @@ -321,8 +321,6 @@ static ex abs_expand(const ex & arg, unsigned options) static ex abs_expl_derivative(const ex & arg, const symbol & s) { ex diff_arg = arg.diff(s); - if (arg.info(info_flags::real)) - return diff_arg*(2*step(arg) - 1); return (diff_arg*arg.conjugate()+arg*diff_arg.conjugate())/2/abs(arg); } -- 2.45.0