# Venn Diagrams

A Venn diagram, popularized by John Venn in the 1880s, represents the logical relation between a finite number of sets. Here we show one way of drawing Venn diagrams, extending to higher numbers of sets up to $$n = 7$$. We design our diagrams not to make any region too small, which tends to happen in Edwards–Venn diagrams.

How are Venn diagrams related to graphs? Here are some considerations.

• What does the planar dual of a Venn diagram tell?
• If each set represents a vertex, where can you find edges? How about cliques?