5 citations
4 papers
Nonautonomous Kolmogorov parabolic equations with unbounded coefficients
M. Kunze, L. Lorenzi, A. Lunardi
We study a class of elliptic operators with unbounded coefficients defined in $I\times\CR^d$ for some unbounded interval $I\subset\CR$. We prove that, for any , the Cau…
Deformation data, Belyi maps, and the local lifting problem
Irene I. Bouw, Stefan Wewers, Leonardo Zapponi
We prove existence and nonexistence results for certain differential forms in positive characteristic, called {\em good deformation data}. Some of these results are obtained by red…
Construction of covers in positive characteristic via degeneration
Irene I. Bouw
In this note we construct examples of covers of the projective line in positive characteristic such that every specialization is inseparable. The result illustrates that it is not…
Theory of Finite or Infinite Trees Revisited
Khalil Djelloul, Thi-bich-hanh Dao, Thom Fruehwirth
We present in this paper a first-order axiomatization of an extended theory of finite or infinite trees, built on a signature containing an infinite set of function symbols and…