In the autograd doc https://pytorch.org/docs/stable/autograd.html#torch.Tensor.is_leaf, I found the following examples:

Screen Shot 2020-01-19 at 2.59.22 AM3812×2108 497 KB

I wonder what is the difference between b and e here? Why is e not a Tensor created by the operation that casts a cpu Tensor into a cuda Tensor, just like b?
Thanks!