Power set: Difference between revisions
→{{header|GAP}}
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Combinations([1, 2, 3]);
# [ [ ], [ 1 ], [ 1, 2 ], [ 1, 2, 3 ], [ 1, 3 ], [ 2 ], [ 2, 3 ], [ 3 ] ]
# Note that it handles duplicates
Combinations([1, 2, 3, 1]);
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