English

Estimating the $p$-adic valuation of the resultant

Number Theory 2021-11-12 v1

Abstract

Let ff and gg be two monic polynomials with integer coefficients and nonzero resultant rr. Assume that vp(f(n))s1v_p(f(n))\ge s_1 and vp(g(n))s2v_p(g(n))\ge s_2 hold for all integers nn for some s1,s2s_1, s_2 fixed non-negative integers. Let SS denote the maximum of vp(gcd(f(n),g(n)))v_p(gcd(f(n),g(n))) over all integers nn. In this paper, we establish multiple lower bound for vp(r)v_p(r). More specifically, we show that vp(r)Smaxs1,s2+ps1s2p1ppkv_p(r)\ge S-\max{s_1,s_2}+ps_1s_2\frac{p-1}{p-p^{-k}}, where k=logp((p1)max{s1,s2}+1)1k=\lfloor \log_p((p-1)\max\{s_1,s_2\}+1)\rfloor -1.

Keywords

Cite

@article{arxiv.2111.06354,
  title  = {Estimating the $p$-adic valuation of the resultant},
  author = {Kristof Szabo},
  journal= {arXiv preprint arXiv:2111.06354},
  year   = {2021}
}