Hi, since I cannot find document on the operations for sparse tensors, are there any support on the multiplication for sparse x dense elementwise multiplication? If so, how about the autograd?

Based on my search, there seems not.

Also, I’m working on adjacency matrix, which is 0/1 sparse matrix, usually do not require grad. Except from converting the adjacency matrix to dense, are there some better methods doing that?

You could try to use the indices/values of the sparse tensor: for each index, look up the index in the dense matrix, and multiply that value with the value in the values matrix.