| SubsetsT(IEnumerableT) | Returns a sequence of IListT representing all of the subsets of any size that are part of the original sequence. In mathematics, it is equivalent to the power set of a set. |
| SubsetsT(IEnumerableT, Int32) | Returns a sequence of IListT representing all subsets of a given size that are part of the original sequence. In mathematics, it is equivalent to the combinations or k-subsets of a set. |