How to perform T-Product of two Tensors using einsum notation?

Question

Tensor Product :

I want to take T-Product of two Tensors

$\matcal{A}, \matcal{B} \in C^{n \times n \times n}$

So, as you all know, T-Product is defined as,

$C = Fold(Batch_Circulant(\matcal{A} * Unfold(\matcal{B}))$

I am trying to solve this using Einstein notation.

In Tensorflow, I'm trying to use tf.einsum() for this.

Somebody please help.

I tried,

tf.einsum('ijk,klm->ijl', A, B)

And

tf.einsum('ijk,klm->ijl', tf.roll(A, 1, axis=0), B)