Simple Set Theory Applet
(© M. Pilant, 1997)

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Needs Netscape 2.0 or later!

Instructions: Select Intersection or Union to see realization Animated Version

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Note: It is often confusing at first:

• Unions are bigger, therefore it seems logical that AND operation is the correct one. However, if an element is in the union of sets A and B it is either in set A OR set B.
• Intersections are smaller, therefore it seems logical that OR operation is the correct one. However, if an element is in the intersection of sets A and B it is in set A AND set B.

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