Use this tag only for superpermutations which are a string containing all of the permutations as a substring of the superpermutation. In other words, the one string (superpermutation) has all of the permutations included in the string as a substring; the substrings can overlap each other which reduces the size of the string.
References
- Wikipedia
- YouTube by Matt Parker
- Superpermutations by Greg Egan