BinaryWord from Finset
A subset of 1..n as its characteristic word: letter i is 1 when i is a member.
Not order-preserving: Subsets lists subsets by size, then lex, while BinaryWords(n) through Finset(word) gives them in their characteristic words' order.
Called as CombinatorialMap(x, "BinaryWord"). The head's page has its examples.
Live
Explore
Each element of Finset at a size, and its image, applied in your browser; sizes past 7 are not offered.
Properties
Transport a statistic
Pick a statistic on BinaryWord. Its distribution over the images of Finset at each size is computed, and compared with the 0 statistics on Finset: those that share it are the ones the map sends it to, as far as the sizes computed show.
Also from
The same name out of other carriers, each its own implementation: DyckPath, IntegerPartition.