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Venn Diagrams

To visualize relationships between 2, 3 or 4 sets we quite often use pictures called Venn diagrams. The standard way to draw these diagrams for 1, 2 and 3 sets is illustrated here. The enclosing rectangle represents the universe.
Observe that the Venn diagram with n sets partitions the universe into tex2html_wrap_inline312 pieces. Here is a picture of the 4 set Venn diagram.

Dan Rinne
Mon Jul 8 15:30:05 PDT 1996