Integral quadratic forms over a ring of $p$-adic integers

Mrunal Hardikar, Anuradha S. Garge

Jungin Lee in 2018 proved a necessary and sufficient condition that an integral quadratic form ${\sum }_{i=1}^m{a}_i{X}_i^2$ is universal over $M_2(\mathbb{Z})$. For a positive integer…