Hopf Algebras, Polynomial Formal Groups and Raynaud Orders, Paperback / softback Book

Hopf Algebras, Polynomial Formal Groups and Raynaud Orders Paperback / softback

Part of the Memoirs of the American Mathematical Society series

Paperback / softback

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This book gives two new methods for constructing $p$-elementary Hopf algebra orders over the valuation ring $R$ of a local field $K$ containing the $p$-adic rational numbers.

One method constructs Hopf orders using isogenies of commutative degree 2 polynomial formal groups of dimension $n$, and is built on a systematic study of such formal group laws.

The other method uses an exponential generalization of a 1992 construction of Greither.

Both constructions yield Raynaud orders as iterated extensions of rank $p$ Hopf algebras; the exponential method obtains all Raynaud orders whose invariants satisfy a certain $p$-adic condition.

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