minors() [2/2]

Matrix * Matrix::minors	(	int	p,
		int	strategy,
		int	n_to_compute,
		M2_arrayintOrNull	first_row,
		M2_arrayintOrNull	first_col ) const

Definition at line 455 of file det.cpp.

{
  if (strategy == DET_BAREISS && get_ring()->get_precision() > 0)
    {
      ERROR(
          "determinant computations over RR or CC requires Strategy=>Cofactor");
      return nullptr;
    }
  if (first_row != nullptr || first_col != nullptr)
    {
      // Make sure these are the correct size, and both are given
      if (first_row == nullptr || first_row->len != p)
        {
          ERROR("row index set inappropriate");
          return nullptr;
        }
      if (first_col == nullptr || first_col->len != p)
        {
          ERROR("column index set inappropriate");
          return nullptr;
        }
    }
  DetComputation *d = new DetComputation(this, p, 0, strategy);
  if (first_row != nullptr && first_col != nullptr)
    d->set_next_minor(first_row->array, first_col->array);
  d->calc(n_to_compute);
  Matrix *result = d->determinants();
  freemem(d);
  return result;
}

References DetComputation::calc(), DET_BAREISS, DetComputation::determinants(), ERROR, freemem(), get_ring(), Matrix(), minors(), p, result(), and DetComputation::set_next_minor().