InversePermutation

InversePermutation[perm] returns the inverse of permutation perm.

Examples

Find the inverse of a permutation list:

InversePermutation[{3, 1, 2}]
(* {2, 3, 1} *)

Find the inverse of a cycles permutation:

InversePermutation[Cycles[{{1, 3, 2}}]]
(* Cycles[{{1, 2, 3}}] *)

Please visit the official Wolfram Language Reference for more details.