English

$B$-orderings for all ideals $B$ of Dedekind domains and generalized factorials

Commutative Algebra 2025-02-27 v1 Number Theory

Abstract

This paper extends Bhargava's theory of p\mathfrak{p}-orderings of subsets SS of a Dedekind ring RR valid for prime ideals p\mathfrak{p} in RR. Bhargava's theory defines for integers k1k\ge1 invariants of SS, the generalized factorials [k]!S[k]!_S, which are ideals of RR. This paper defines b\mathfrak{b}-orderings of subsets SS of a Dedekind domain DD for all nontrivial proper ideals b\mathfrak{b} of DD. It defines generalized integers [k]S,T[k]_{S,T}, as ideals of DD, which depend on SS and on a subset TT of the proper ideals ID\mathscr{I}_D of DD. It defines generalized factorials [k]!S,T[k]!_{S,T} and generalized binomial coefficients, as ideals of DD. The extension to all ideals applies to Bhargava's enhanced notions of rr-removed p\mathfrak{p}-orderings, and p\mathfrak{p}-orderings of order hh.

Keywords

Cite

@article{arxiv.2502.19072,
  title  = {$B$-orderings for all ideals $B$ of Dedekind domains and generalized factorials},
  author = {Jeffrey C. Lagarias and Wijit Yangjit},
  journal= {arXiv preprint arXiv:2502.19072},
  year   = {2025}
}

Comments

28 pages