unsigned precedence() const {return 55;}
bool info(unsigned inf) const;
ex eval(int level = 0) const;
+ ex real_part() const;
+ ex imag_part() const;
exvector get_free_indices() const;
protected:
/** This function returns the given expression with expanded sums
* for all dummy index summations, where the dimensionality of
- * the dummy index is numeric.
+ * the dummy index is a nonnegative integer.
* Optionally all indices with a variance will be substituted by
* indices with the corresponding numeric values without variance.
*