Hi guys,
I am having troubles with a simple operation. I would like to combine two tensors of forms ( torch.Size([28, 1, 28, 1], torch.Size([1, 28, 1, 28] ) into a single tensor of size  torch.Size([ 28, 28, 28, 28])  as a direct sum, i.e., without broadcasting operations.
(Note that this is not the case with, for example, sum, as it broacasts sums and thus modifies the values of the original tensors).
Thanks a lot! 
David