identity()

Matrix * Matrix::identity ( const FreeModule * F )

static

Definition at line 380 of file matrix.cpp.

{
  const Ring *R = F->get_ring();
  const ring_elem one = R->from_long(1);
  MatrixConstructor mat(F, F, nullptr);
  for (int i = 0; i < F->rank(); i++) mat.set_entry(i, i, R->copy(one));
  return mat.to_matrix();
}

References Ring::copy(), FreeModule, Ring::from_long(), FreeModule::get_ring(), identity(), Matrix(), MatrixConstructor, FreeModule::rank(), MatrixConstructor::set_entry(), and MatrixConstructor::to_matrix().

Referenced by identity().