UT3Frame.has_minimal_ranks
==========================

.. py:method:: t3toolbox.uniform_frame_variations_format.UT3Frame.has_minimal_ranks()

   .. code-block:: python

      def has_minimal_ranks(self) -> NDArray:  # bool array, shape = stack_shape (per element; uniform ranks vary)


   True (per stack element) if the frame has structurally minimal ranks: ``left==right``,
   ``up==down``, and up/left equal the minimal ranks for the shape (reduced over the mode axis).
   Non-enforcing; not a correctness precondition (``docs/numerical_contracts.md``).