T3Tangent.tangent_stack_shape
=============================

.. py:method:: t3toolbox.manifold.T3Tangent.tangent_stack_shape()

   .. code-block:: python

      def tangent_stack_shape(self) -> typ.Tuple[int, ...]:


   Tangent stack ``K``: the extra *outer* batch of tangent vectors sharing this frame.

   This is the part of the variation stack that exceeds the frame stack (often empty). The
   variation cores are stacked as ``K + C + (core,)`` -- extra axes outermost, frame stack inner.