#include <stdexcept>
#include "color.h"
-#include "ex.h"
#include "idx.h"
#include "ncmul.h"
#include "numeric.h"
// d.akl d.bkl = 5/3 delta.ab
} else if (dummy_indices.size() == 2) {
exvector a;
- back_insert_iterator<exvector> ita(a);
+ std::back_insert_iterator<exvector> ita(a);
ita = set_difference(self_indices.begin(), self_indices.end(), dummy_indices.begin(), dummy_indices.end(), ita, ex_is_less());
ita = set_difference(other_indices.begin(), other_indices.end(), dummy_indices.begin(), dummy_indices.end(), ita, ex_is_less());
GINAC_ASSERT(a.size() == 2);