Sets

12. VENN-EULER DIAGRAMS

A simple and instructive way of illustrating the relationships between sets is in the use of the so-called Ven-Euler diagrams or, simply, 

Venn diagrams. Here we represent a set by a simple plane area, usually bounded by a circle.

Example 13.1: Suppose A⊂B and, say, A≠B, then A and B can be described by either diagram