what is power set with examples
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A power set is set of all subsets, empty set and the original set itself. For example, powerset of A={1,2} is PA = {{}, {1}, {2}, {1,2}}.
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In mathematics, the power set of a set S is the set of all subsets of S, including the empty set and S itself. In axiomatic set theory, the existence of the power set of any set is postulated by the axiom of power set. The powerset of S is variously denoted as P, , P, ℙ, ℘, or 2S
example :A={1,2} is PA = {{}, {1}, {2}, {1,2}}.
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