Fix-Mahonian calculus, I: Two transformations

  title={Fix-Mahonian calculus, I: Two transformations},
  author={Dominique Foata and Guo-Niu Han},
  journal={Eur. J. Comb.},
We construct two bijections of the symmetric group Sn onto itself that enable us to show that three new three-variable statistics are equidistributed with classical statistics involving the number of fixed points. The first one is equidistributed with the triplet (fix, des, maj), the last two with (fix, exc, maj), where “fix,” “des,” “exc” and “maj” denote the number of fixed points, the number of descents, the number of excedances and the major index, respectively.