Fixing bug with respect to canonicalizing the variance of dummy indices in

[ginac.git] / ginac / symmetry.h

diff --git a/ginac/symmetry.h b/ginac/symmetry.h
index 4168013ed4d391e438154dae129107d4f702c535..80a2386d791048bf7da8fec7b4ad13c64d343cd5 100644 (file)
--- a/ginac/symmetry.h
+++ b/ginac/symmetry.h
@@ -80,6 +80,8 @@ public:
 
        /** Check whether this node actually represents any kind of symmetry. */
        bool has_symmetry() const {return type != none || !children.empty(); }
+       /** Check whether this node involves a cyclic symmetry. */
+       bool has_cyclic() const;
 
 protected:
        void do_print(const print_context & c, unsigned level) const;