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math.AG2004
On the 0-dimensional irreducible components of the singular locus of $\Cal A_g$
V. Gonzalez -Aguilera, J. M. Munoz-Porras, Alexis G. Zamora
In this short note we give a characterization of extremal principally polarized abelian varieties determining an isolated point in $Sing \Cal A_g$. The case is treated with d…
math.AG2004★ 2 cited
On complex surfaces with 5 or 6 semistable singular fibers over P^1
Sheng-Li Tan, Yuping Tu, Alexis G. Zamora
Let be a fibered surface with fibers of genus g>1. If f is semistable and non isotrivial we prove that X of non negative Kodaira dimension implies that the number…
math.AG2003
Unipotent reduction and the Poincare Problem
A. G. Zamora
The Poincare Problem can be reduced to a problem on fibered surfaces, concretely, to bound the genus of the fibration by means of numerical information of the canonical sheaf of th…