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. This book features a method which constructs Hopf orders using isogenies of commutative degree 2 polynomial formal groups of dimension $n$.
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. This book features a method which constructs Hopf orders using isogenies of commutative degree 2 polynomial formal groups of dimension $n$.