A Leisurely Introduction to Formal Groups and Elliptic Curves, by Antonia W. Bluher
The purpose of this paper is twofold:
to explain in an elementary way how to associate a formal group law
to an elliptic curve over an arbitrary ground field
and to discuss some theorems related to work
of Couveignes.
Antonia W. Bluher <bluher@afterlife.ncsc.mil>