Power Set
℘
Type it
| Unicode | U+2118 | |
|---|---|---|
| LaTeX | \wp | |
| HTML entity | ℘ | |
| Character | ℘ |
Meaning
Written before a set, it means the set of all its subsets, including the empty set and the set itself. A set with n elements has 2ⁿ subsets. Compare with Subset Of or Equal To and Empty Set.
How to read it
℘({1, 2}) = {∅, {1}, {2}, {1, 2}}
is read “the power set of one, two is the set containing the empty set, one, two, and one, two”.