* Interface to GiNaC's indexed expressions. */
/*
- * GiNaC Copyright (C) 1999-2005 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2006 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
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:
ex derivative(const symbol & s) const;
ex thiscontainer(const exvector & v) const;
ex thiscontainer(std::auto_ptr<exvector> vp) const;
- unsigned return_type() const { return return_types::commutative; }
+ unsigned return_type() const;
+ tinfo_t return_type_tinfo() const { return op(0).return_type_tinfo(); }
ex expand(unsigned options = 0) const;
// new virtual functions which can be overridden by derived classes
// utility functions
-/** Specialization of is_exactly_a<indexed>(obj) for indexed objects. */
-template<> inline bool is_exactly_a<indexed>(const basic & obj)
-{
- return obj.tinfo()==TINFO_indexed;
-}
-
/** Returns all dummy indices from the expression */
exvector get_all_dummy_indices(const ex & e);
+/** More reliable version of the form. The former assumes that e is an
+ * expanded epxression. */
+exvector get_all_dummy_indices_safely(const ex & e);
+
+/** Returns b with all dummy indices, which are listed in va, renamed
+ * if modify_va is set to TRUE all dummy indices of b will be appended to va */
+ex rename_dummy_indices_uniquely(exvector & va, const ex & b, bool modify_va = false);
+
/** Returns b with all dummy indices, which are common with a, renamed */
ex rename_dummy_indices_uniquely(const ex & a, const ex & b);
+/** Same as above, where va and vb contain the indices of a and b and are sorted */
+ex rename_dummy_indices_uniquely(const exvector & va, const exvector & vb, const ex & b);
+
+/** Similar to above, where va and vb are the same and the return value is a list of two lists
+ * for substitution in b */
+lst rename_dummy_indices_uniquely(const exvector & va, const exvector & vb);
+
/** This function returns the given expression with expanded sums
* for all dummy index summations, where the dimensionality of
* the dummy index is numeric.