... record values and the length function. Two approaches are here systematically explored, us-ing the flag-major index on the one hand, and the flag-inversion number on the other hand. The MacMahon ... using the “fmaj” interpretation, on the one hand, and the “finv”geometry, on the other. In each case we will go beyond the three-variable case, aswe consider the generating polynomial for the ... +1).(2.3)Proof. Keep the same notations as in (2.1). If cj=2k,thencjis an even lowerrecord, as well as all the letters equal to 2k to the right of cj. On the other hand, thereis no even lower...