muEC::SG::Perm2Betti – computes the Betti polynomial

The muEC::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.

→ Examples

Call:

muEC::SG::Perm2Betti(p, q)

Parameters:

p

any list denoting a permutation

q

a formal variable

Related Functions:

muEC::SG::CompPerm, muEC::SG::Perm2Interval

Example 1:

muEC::SG::Perm2Betti( [3,4,1,2], q );

math