Given a set A, the power set of A is all the subsets of A. This is written in set notation as ℘(A) = { X | X ⊆ A }. Note that the empty set is always a member of every power set and every set is a member of its own power set.
Given set B = {3, 7, 8}, the power set of B is defined as ℘(B) = { X | X ⊆ B } = { {}, {3}, {7}, {8}, {3, 7}, {3, 8}, {7, 8}, {3, 7, 8} }.
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T | U | V | W | X |
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