On three-variable expanders over finite valuation rings

Nguyen Van The, Phuc D Tran, Le Quang Ham +1

Let $\mathcal{R}$ be a finite valuation ring of order $q^r$. In this paper, we prove that for any quadratic polynomial $f(x,y,z)\in \mathcal{R}[x,y,z]$ that is of the form $axy+R(…