2 papers
math.NT2004
Positivity of Heights of Semistable Varieties
Roberto G. Ferretti
We completely solve a problem of S. Zhang about the positivity of a normalized height on the moduli space of semistable varieties of given degree and given dimension.
math.AG1998
Mumford's Degree of Contact and Diophantine Approximations
Roberto G. Ferretti
The Schmidt Subspace Theorem affirms that the solutions of some particular system of diophantine approximations in projective spaces accumulates on a finite number of proper linear…