2 papers
math.NT2020
Minimal universality criterion sets on the representations of quadratic forms
Kyoungmin Kim, Jeongwon Lee, Byeong-Kweon Oh
For a set of (positive definite and integral) quadratic forms with bounded rank, a quadratic form is called -universal if it represents all quadratic forms in . A sub…
math.NT2019
A sum of three nonunit squares of integers
Daejun Kim, Jeongwon Lee, Byeong-Kweon Oh
We say a positive integer is a sum of three nonunit squares if it is a sum of three squares of integers other than one. In this article, we find all integers which are sums of thre…