Sorry, there are some doubts in reading the paper and code.
In the dcrnn_cell.py, start on line 161, why is this a concat operation. Is this step reflected in the paper?
And how to understand x2 = 2 * tf.sparse_tensor_dense_matmul(support, x1) - x0.
To best of my knowledge, diffusion convolution is a summation operation in the paper. And the paper doesn't seem to mention the operation of stacking.
Looking forward to your answer, thanks.
Sorry, there are some doubts in reading the paper and code. In the dcrnn_cell.py, start on line 161, why is this a concat operation. Is this step reflected in the paper? And how to understand x2 = 2 * tf.sparse_tensor_dense_matmul(support, x1) - x0. To best of my knowledge, diffusion convolution is a summation operation in the paper. And the paper doesn't seem to mention the operation of stacking. Looking forward to your answer, thanks.![1](https://user-images.githubusercontent.com/52064834/226085054-e98140d9-73b4-40cd-8ca9-ec20ac653cd3.png)