*/
/*
- * GiNaC Copyright (C) 1999-2010 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2011 Johannes Gutenberg University Mainz, Germany
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
/* F_ab(a, i, b, j, "x") is a common pattern in all vertex evaluators. */
static ex F_ab(int a, int i, int b, int j, const symbol &x)
{
+ using GiNaC::tgamma;
if ((i==0 && a<=0) || (j==0 && b<=0))
return 0;
else