UT3Tangent.entries
==================

.. py:method:: t3toolbox.uniform_manifold.UT3Tangent.entries(index)

   .. code-block:: python

      def entries(
              self,
              index:  NDArray,  # int, shape=(d,)+W (a stack W of multi-indices)
      ) -> NDArray:             # scalar entries, shape=W+K+C


   Entries of the dense tangent at ``index`` (= :py:meth:`apply` with unit vectors, by fiber
   slicing). The bare ``𝒥``. Uniform mirror of :py:meth:`~t3toolbox.manifold.T3Tangent.entries`.

   .. rubric:: Examples

   >>> import numpy as np
   >>> import t3toolbox.tucker_tensor_train as t3
   >>> import t3toolbox.uniform_tucker_tensor_train as ut3
   >>> import t3toolbox.uniform_manifold as ut3m
   >>> np.random.seed(0)
   >>> x = ut3.UniformTuckerTensorTrain.from_t3(t3.TuckerTensorTrain.randn((10, 11, 12), (5, 6, 4), (1, 2, 3, 1)))
   >>> v = ut3m.UNIFORM_COREWISE.randn(ut3m.UNIFORM_MANIFOLD.frame(x))
   >>> print(bool(abs(float(v.entries((3, 5, 7))) - float(v.to_dense()[3, 5, 7])) < 1e-9))
   True