Speaker Damien Robert
Affiliation INRIA Bordeaux - Sud-Ouest
Host Kristin Lauter
Date recorded 20 October 2010
Vélu's formulas allow to compute an isogeny between elliptic curves from the coordinates of the points in the kernel. In this talk, I describe an algorithm using theta functions to compute an isogeny from its kernel on any abelian variety. I will give specific timings of a genus 2 implementation, and describe some applications.
This is a joint work with Romain Cosset and David Lubicz.
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