rank() [2/5]

size_t MatrixOps::rank ( const DMatQQFlint & A )

inline

Definition at line 1096 of file mat-linalg.hpp.

{
  // fmpq_mat has no rank function.
  // So we clear denominators row-wise (or column-wise), and compute the rank of
  // that matrix.
  fmpz_mat_t m1;
  fmpz_mat_init(m1, A.numRows(), A.numColumns());
  fmpq_mat_get_fmpz_mat_rowwise(m1, nullptr, A.fmpq_mat());
  // fmpz_mat_print_pretty(m1);
  size_t rk = fmpz_mat_rank(m1);
  fmpz_mat_clear(m1);
  return rk;
}

References DMat< M2::ARingQQFlint >::fmpq_mat(), DMat< M2::ARingQQFlint >::numColumns(), and DMat< M2::ARingQQFlint >::numRows().