diff_n()

TowerPolynomial DPoly::diff_n ( int level, int whichvar, const TowerPolynomial f )

private

Definition at line 1343 of file dpoly.cpp.

{
  TowerPolynomial result;
  if (whichvar == 0)
    {
      result = alloc_poly_0(f->deg - 1);
      for (int i = 1; i <= f->deg; i++)
        {
          TowerPolynomial c = f->arr.polys[i];
          if (c != nullptr) result->arr.polys[i - 1] = mult_by_int(level - 1, i, c);
        }
    }
  else
    {
      result = alloc_poly_0(f->deg);
      for (int i = 0; i <= f->deg; i++)
        {
          TowerPolynomial c = f->arr.polys[i];
          if (c != nullptr) result->arr.polys[i] = diff(level - 1, whichvar - 1, c);
        }
    }
  reset_degree_n(level, result);
  return result;
}

References alloc_poly_0(), diff(), mult_by_int(), reset_degree_n(), and result().

Referenced by diff().