A note on internality of certain differential systems
arXiv:2509.02439 · doi:10.4153/S0008439526101787
Abstract
We prove two results, generalizing certain theorems by Jin and Moosa, on the internality of the system of differential equations \begin{equation*} \begin{aligned} x' &= f(x)\\ y' &= g(x)y,\\ \end{aligned} \end{equation*}where and are rational functions in one variable.
6 pages. Revised version with minor corrections and additional references. Accepted for publication in Canadian Mathematical Bulletin