The isotropy group of a derivation on a Danielewski-type algebra

Abdessamad Ahouita, Rene Baltazar, M'hammed El Kahoui +1

Given an algebraically closed field $k$ of characteristic zero, we consider in this paper $k$-algebras of the form $$A_{c,q}=k[x,y,z]/(c(x)z-q(x,y)),$$ where $c(x)\in k[x]$…