Integral points on elliptic curves and 3-torsion in class groups
Abstract
Description
We give new bounds for the number of integral points on elliptic curves. The method may be said to interpolate between approaches via diophantine techniques ([BP], [HBR]) and methods based on quasiorthogonality in the Mordell-Weil lattice ([Sil6], [GS], [He]). We apply our results to break previous bounds on the number of elliptic curves of given conductor and the size of the 3-torsion part of the class group of a quadratic field. The same ideas can be used to count rational points on curves of higher genus.
23 pages, no figures, v2. To appear in J. Amer. Math. Soc
23 pages, no figures, v2. To appear in J. Amer. Math. Soc