Distribution of the traces of Frobenius on elliptic curves over function fields, by Amilcar Pacheco
Given a non-constant elliptic curve E defined over a one variable
field K over a finite field and S->C its minimal regular model. We
the number of points of C where the fiber is smooth and ordinary having
a prescribed trace of Frobenius. Examples of universal elliptic curves
over certain modular curves are discussed.
Amilcar Pacheco < email@example.com>