From 58b1160aa40d2fb839dd9f34c73dc15358a3563a Mon Sep 17 00:00:00 2001 From: Christian Bauer Date: Mon, 22 Jul 2002 20:33:13 +0000 Subject: [PATCH] synced to 1.0 --- ginac/symmetry.cpp | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/ginac/symmetry.cpp b/ginac/symmetry.cpp index 78dd75cf..d48ed3f1 100644 --- a/ginac/symmetry.cpp +++ b/ginac/symmetry.cpp @@ -305,7 +305,7 @@ public: int canonicalize(exvector::iterator v, const symmetry &symm) { - // Less than two indices? Then do nothing + // Less than two elements? Then do nothing if (symm.indices.size() < 2) return INT_MAX; @@ -335,6 +335,8 @@ int canonicalize(exvector::iterator v, const symmetry &symm) case symmetry::antisymmetric: // Sort the children in ascending order, keeping track of the signum sign *= permutation_sign(first, last, sy_is_less(v), sy_swap(v, something_changed)); + if (sign == 0) + return 0; break; case symmetry::cyclic: // Permute the smallest child to the front -- 2.47.0