English

On the generating polynomials for the distribution of generalized binomial coefficients in discrete valuation domains

Number Theory 2020-06-16 v1 Commutative Algebra Combinatorics

Abstract

For a discrete valuation domain VV with maximal ideal m\mathfrak{m} such that the residue field V/mV/\mathfrak{m} is finite, there exists a sequence of polynomials (Fn(x))n0(F_n(x))_{n \ge 0} defined over the quotient field KK of VV that forms a basis of the VV-module Int(V)={fK[x]f(V)V}\text{Int}(V) = \{f \in K[x] | f(V)\subseteq V\}. This sequence of polynomials bears many resemblances to the classical binomial polynomials ((xn))n0(\binom{x}{n})_{n \ge 0}. In this paper, we introduce a generating polynomial to account for the distribution of the VV-values of the polynomials Fn(x)F_n(x) modulo the maximal ideal m\mathfrak{m}, and prove a result that provides a method for counting exactly how many VV-values of the polynomials (Fn(x))n0(F_n(x))_{n \ge 0} fall into each of the residue classes modulo m\mathfrak{m}. Our main theorem in this paper can be viewed as an analogue of the classical theorem of Garfield and Wilf in the context of discrete valuation domains.

Keywords

Cite

@article{arxiv.2006.07423,
  title  = {On the generating polynomials for the distribution of generalized binomial coefficients in discrete valuation domains},
  author = {Dong Quan Ngoc Nguyen},
  journal= {arXiv preprint arXiv:2006.07423},
  year   = {2020}
}