=ADD= =reftype= 14 =number= 00-01 =url= ftp://ftp.risc.uni-linz.ac.at/pub/techreports/2000/00-01.ps.gz =year= 2000 =month= 01 =author= Schicho; Josef =title= Proper Parametrization of Surfaces with a Rational Pencil =abstract= We give an algorithm for the following problem: given a surface defined over $\mathbb{Q}$, and a rational pencil on it, compute a proper parametrization with coefficients in $\mathbb{Q}$. =note= submitted to ISSAC 2000 =sponsor= FWF/SFB project F1302