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What Is Duality Principle?

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DUALITY principle STATES that for any TRUE statement, the dual statement obtained by interchanging unions into intersections (and vice versa) and interchanging Universal set into Null set (and vice versa) is also true. If dual of any statement is the statement itself, it is said self-dual statement.

EXAMPLE − The dual of (A∩B)∪C is (A∪B)∩C

Duality principle states that for any true statement, the dual statement obtained by interchanging unions into intersections (and vice versa) and interchanging Universal set into Null set (and vice versa) is also true. If dual of any statement is the statement itself, it is said self-dual statement.

Example − The dual of (A∩B)∪C is (A∪B)∩C


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