Adjacency tables, how do they work

graph theory

I'm struggling to find out how adjacency tables work. I just have no idea where they get the numbers from. Here's an example:
enter image description here

I've kinda figured out just by looking at the graphs and numbers how they get the numbers from 7-22, but after that I'm completely lost. Can anyone help explain this to me?

Thanks!

Best Answer

Say you want to read the adjacent vertices to $v_5$. Note that this is a pretty funny system, an adjacency matrix is much easier to read.enter image description here

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