# Venn diagram

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A Venn diagram  is a visual tool used in describing how two or more sets are logically related to one another. The simplest example is a Venn diagram for two sets. Each set is represented by a planar region bounded by a circle, so that the two regions overlap. In the diagram below, set $A$ is represented by the reddish circular disc and set $B$ is represented by the bluish circular disc:

Typically, the two sets are subsets of some bigger set $U$, called a universe  . Therefore, the corresponding Venn diagram above is shown to be sitting inside a larger rectangular region representing the universe:

Notice that the region representing the universe $U$ is partitioned into $4$ mutually exclusive regions:

Title Venn diagram VennDiagram 2013-03-22 17:45:43 2013-03-22 17:45:43 CWoo (3771) CWoo (3771) 16 CWoo (3771) Definition msc 00A05 msc 00A06 msc 03E99