1.NounThe set whose elements comprise all the subsets of S (including the empty set and S itself)."The power set of
{
1
,
2
}
{\displaystyle \{1,2\}}
is
{
∅
,
{
1
}
,
{
2
}
,
{
1
,
2
}
}
{\displaystyle \left\{\emptyset ,\{1\},\{2\},\{1,2\}\right\}}
."