3:45PM: Algebraic ordinary differential equations: General rational solutions and classificationFranz Winkler, Research Institute for Symbolic Computation (RISC) , J. Kepler University Linz, AustriaConsider an algebraic ODE (AODE) of the form $F(x,y,y')=0$, where $F$ is a trivariate polynomial, and $y' = \frac{dy}{dx}$. The polynomial $F$ defines an algebraic surface, which we assume to admit a rational parametrization. Based on such a parametrization we can generically determine the existence of a rational general solution, and, in the positive case, also compute one. This method depends crucially on curve and surface parametrization and the determination of rational invariant algebraic curves. Further research is directed towards a classification of AODEs w.r.t. groups of transformations (affine, birational) preserving rational solvability.

5:00PM: Golod AlgebrasAdam Boocher
