$$
$$
Continuing our tour of the many flavors of graphs and their manifestation as 
-sets, we discuss reflexive graphs, a seemingly minor variant of graphs that nonetheless has some interesting and distinctive features. A reflexive graph is a graph where every vertex has a distinguished self-loop, like this:
This is a companion discussion topic for the original entry at https://blog.algebraicjulia.org/post/2021/04/cset-graphs-3/