docs: def rsolve(A, b, epsilon=_epsilon):
      r"""Robust solve for the linear equations.
  
      Args:
          A (array_like): Coefficient matrix.
          b (array_like): Ordinate values.
  
      Returns:
          :class:`numpy.ndarray`: Solution ``x``.
      """
      A = asarray(A, float)
      b = asarray(b, float)
      if A.shape[0] == 0:
          return zeros((A.shape[1],))
      if A.shape[1] == 0:
          return zeros((0,))
      try:
          x = lstsq(A, b, rcond=epsilon)
          r = sum(x[3] > epsilon)
          if r == 0:
              return zeros(A.shape[1])
          return x[0]
      except (ValueError, LinAlgError) as e:
          warnings.warn(str(e), RuntimeWarning)
      return solve(A, b)