votes up 1

A blockwise lower-triangular operator with a singular operator on the main diagonal is always singular.

Package:
Exception Class:
ValueError

Raise code

 is_non_singular is False:
        raise ValueError(
            "A blockwise lower-triangular operator with non-singular operators "
            " on the main diagonal is always non-singular.")
      return True
    if any(op.is_non_singular is False for op in self._diagonal_operators):
      if is_non_singular is True:
        raise ValueError(
            "A blockwise lower-triangular operator with a singular operator on "
            "the main diagonal is always singular.")
      return False

  def _validate_square(self, is_square):
    if is_square is False:
      raise ValueError("`LinearOperatorBlockLowerTriangular` must be square.")
    if a
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