support()

M2_arrayint Tower::support ( const ring_elem a ) const

virtual

Reimplemented from Ring.

Definition at line 91 of file tower.cpp.

{
  TowerPolynomial f1 = TOWER_POLYNOMIAL_VAL(a);
  std::vector<int> max_degs;
  D->degrees_of_vars(f1, max_degs);
  int nelems = 0;
  for (size_t i = 0; i < max_degs.size(); i++)
    if (max_degs[i] > 0) nelems++;
  M2_arrayint result = M2_makearrayint(nelems);
  int next = 0;
  for (size_t i = 0; i < max_degs.size(); i++)
    if (max_degs[i] > 0) result->array[next++] = static_cast<int>(i);
  return result;
}

References D, M2_makearrayint(), result(), and TOWER_POLYNOMIAL_VAL.