What's the purpose of empty graph in padding?

[EngineerKhan]

Hi!

I came across the padding function (pad_with_graphs) and have a naive question: why do we use an empty graph there? Also, we specify only the number of edges (and nodes). Which algorithm determines their incidence (i.e. which edge would connect which pair of nodes)? Thanks a lot.

[jg8610]

Hey!

Good question - we connect all edges to a single node (the first one) and then all other nodes are disconnected.

We use this because then with unpad_with_graphs we know how to remove the padding graph.