Hi, tested x86_64-linux multilib, committed mainline and 4_6-branch.
Thanks, Paolo. ///////////////////
2011-11-15 Jason Dick <dick...@gmail.com> PR libstdc++/51133 * include/tr1/poly_hermite.tcc (__poly_hermite_recursion): Fix wrong sign in recursion relation.
Index: include/tr1/poly_hermite.tcc =================================================================== --- include/tr1/poly_hermite.tcc (revision 181359) +++ include/tr1/poly_hermite.tcc (working copy) @@ -1,6 +1,6 @@ // Special functions -*- C++ -*- -// Copyright (C) 2006, 2007, 2008, 2009, 2010 +// Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 // Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free @@ -84,7 +84,7 @@ unsigned int __i; for (__H_nm2 = __H_0, __H_nm1 = __H_1, __i = 2; __i <= __n; ++__i) { - __H_n = 2 * (__x * __H_nm1 + (__i - 1) * __H_nm2); + __H_n = 2 * (__x * __H_nm1 - (__i - 1) * __H_nm2); __H_nm2 = __H_nm1; __H_nm1 = __H_n; }