SG::Perm2Betti --
computes the Betti polynomial
Call(s)
SG::Perm2Betti(p,q)
Parametersp | - | any list denoting a permutation |
q | - | a formal variable |
Introduction
The SG::Perm2Betti function computes the generating function of the lengths of
all permutations that are smaller than a given permutation p,
according to Bruhat order.
Example 1>> muEC::SG::Perm2Betti( [3,4,1,2], q );
2 3 4
3 q + 5 q + 4 q + q + 1
Related FunctionsMuPAD Combinat, an open source algebraic combinatorics package