Faltings heights of CM elliptic curves and special Gamma values

Products of CM elliptic curves

Derivatives of Eisenstein series and Faltings heights

In a series of papers, [25], [30], [28], [29], [31], [26], we showed that certain quantities from the arithmetic geometry of Shimura varieties associated to orthogonal groups occur in the Fourier coefficients of the derivative of suitable Siegel-Eisenstein series. It was essential in these examples that this derivative was the second term in the Laurent expansion of a Siegel-Eisenstein series a...

On 3-adic Heights on Elliptic Curves

In 2006, Mazur, Stein, and Tate [4] gave an algorithm for computing p-adic heights on elliptic curves E over Q for good, ordinary primes p ≥ 5. Their work makes essential use of Kedlaya’s algorithm [3], where the action of Frobenius is computed on a certain basis of the first de Rham cohomology of E, with E given by a “short” Weierstrass model. Kedlaya’s algorithm requires that the working mode...

CM liftings of supersingular elliptic curves

Assuming GRH, we present an algorithm which inputs a prime p and outputs the set of fundamental discriminants D < 0 such that the reduction map modulo a prime above p from elliptic curves with CM by OD to supersingular elliptic curves in characteristic p. In the algorithm we first determine an explicit constant Dp so that |D| > Dp implies that the map is necessarily surjective and then we compu...

Minimal Cm Liftings of Supersingular Elliptic Curves

In this paper, we give a ‘direct’ construction of the endomorphism ring of supersingular elliptic curves over a prime field Fp from ‘ideal classes’ of Q( √−p). We use the result to prove that the result of Kaneko on ‘minimal’ CM liftings of such supersingular elliptic curves is a best possible result. We also prove that the result of Elkies on ‘minimal’ CM liftings of all supersingular elliptic...