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math.AG2003
On the 1-pointed curves arising as etale covers of the affine line in positive characteristic
Leonardo Zapponi
Let k be an algebraically closed field of positive characteristic. The goal of this paper is to characterize the proper smooth curves X/k of positive genus g equipped with a k-rati…
math.AG2002
Specialization of polynomial covers of prime degree
Leonardo Zapponi
Let K be a complete field of unequal characteristics . The aim of this paper is to describe the the semi-stable models for covers of degree p, u…
math.AG2001
Galois Action on Diameter Four Trees
Leonardo Zapponi
The object of this paper is the study of a class of dessins d'enfants, the so-called diameter four trees. These objects, first introduced by G. Shabat, can be considered as the sim…