Abstract: The Selmer group of an elliptic curve over a number field encodes several arithmetic data of the curve providing a p-adic approach to the Birch and Swinnerton Dyer, connecting it with the p-adic L-function via the Iwasawa main conjecture. Under suitable extensions of the number field, the dual Selmer group becomes a module over the Iwasawa algebra of a certain compact p-adic Lie group over Z_p (the ring of p-adic integers), which is a completed group algebra.

In this talk, we give an explicit ring-theoretic presentation, by generators and relations, of Iwasawa algebras and explore the structure of Selmer groups over non-commutative Lie extensions.