-/** Inert partial differentiation operator. */
-DECLARE_FUNCTION_2P(Derivative)
-
-ex lsolve(const ex &eqns, const ex &symbols);
-
-/** Symmetrize expression over a set of objects (symbols, indices). */
-ex symmetrize(const ex & e, exvector::const_iterator first, exvector::const_iterator last);
-
-/** Symmetrize expression over a set of objects (symbols, indices). */
-inline ex symmetrize(const ex & e, const exvector & v)
-{
- return symmetrize(e, v.begin(), v.end());
-}
-
-/** Antisymmetrize expression over a set of objects (symbols, indices). */
-ex antisymmetrize(const ex & e, exvector::const_iterator first, exvector::const_iterator last);
-
-/** Antisymmetrize expression over a set of objects (symbols, indices). */
-inline ex antisymmetrize(const ex & e, const exvector & v)
-{
- return antisymmetrize(e, v.begin(), v.end());
-}