Hi,
I’ve seen some recent progress on SparseTensors, and I have some questions:

Do You have a roadmap for the whole sparse module? I’m curious if you’re planning to use cuSPARSE and if there is any way to contribute to this module.
I’d need a backward pass for sparse_mat @ dense_mat. What are my options? Can I write a Function using the available spmm for forward, and add some quick-and-dirty cython code to do the backward? This would mean returning a sparse grad, is this supported?

Thank You for your time, I’m really enjoying PyTorch so far.