2018
Nov
26

# Combinatorics: Ron Adin, BIU, "Cyclic permutations, shuffles and quasi-symmetric functions"

11:00am to 1:00pm

## Location:

Rothberg CS bldg, room B500, Safra campus, Gival Ram

Speaker: Ron Adin, Bar-Ilan University
Title: Cyclic permutations, shuffles and quasi-symmetric functions
Abstract:
By a theorem of Stanley, the distribution of descent number over all the shuffles of two permutations depends only on the descent numbers of these permutations. For a quantitative version of this result and its cyclic analogue, we use a new cyclic counterpart of Gessel's ring of quasi-symmetric functions, together with an unusual homomorphism and a mysterious binomial identity.
No previous acquaintance assumed.