Minimal rank of primitively $n$-universal integral quadratic forms over local rings
Number Theory
2024-12-20 v1
Abstract
Let be a local field and let be its ring of integers. For a positive integer , an integral quadratic form defined over is called primitively -universal if it primitively represents all quadratic forms of rank . It was proved in arXiv:2005.11268 that the minimal rank of primitively -universal quadratic forms over the -adic integer ring is if is odd, and otherwise. In this article, we completely determine the minimal rank of primitively -universal quadratic forms over for any positive integer and any local ring such that is a unit or a prime.
Cite
@article{arxiv.2412.14709,
title = {Minimal rank of primitively $n$-universal integral quadratic forms over local rings},
author = {Byeong-Kweon Oh and Jongheun Yoon},
journal= {arXiv preprint arXiv:2412.14709},
year = {2024}
}