Date Available
4-18-2018
Year of Publication
2018
Degree Name
Doctor of Philosophy (PhD)
Document Type
Doctoral Dissertation
College
Arts and Sciences
Department/School/Program
Mathematics
First Advisor
Dr. Richard Ehrenborg
Abstract
In this dissertation we first introduce an extension of the notion of parking functions to cars of different sizes. We prove a product formula for the number of such sequences and provide a refinement using a multi-parameter extension of the Abel--Rothe polynomial. Next, we study the incidence Hopf algebra on the noncrossing partition lattice. We demonstrate a bijection between the terms in the canceled chain decomposition of its antipode and noncrossing hypertrees. Thirdly, we analyze the sum of the πth powers of the descent set statistic on permutations and how many small prime factors occur in these numbers. These results depend upon the base π expansion of both the dimension and the power of these statistics. Finally, we inspect the Ζ-vector of the descent polytope DPv, proving a maximization result using an analogue of the boustrophedon transform.
Digital Object Identifier (DOI)
https://doi.org/10.13023/ETD.2018.149
Recommended Citation
Happ, Alexander Thomas, "A Combinatorial Miscellany: Antipodes, Parking Cars, and Descent Set Powers" (2018). Theses and Dissertations--Mathematics. 53.
https://uknowledge.uky.edu/math_etds/53