A recursive approach (which is what I would use) would involve breaking the problem into isomorphic subproblems: to find all permutations of a string, find all permutations of the string without a ...

Eulerian Polynomials and Permutation Statistics Publication Trend The graph below shows the total number of publications each year in Eulerian Polynomials and Permutation Statistics.

In 2024, research into certified reversible primitive permutations has demonstrated novel iteration schemes and formal guarantees that bridge classical primitive recursive functions with modern ...