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math.AT2001
Formal groups over Hopf algebras
A. V. Ershov
In this paper we study some generalization of the notion of a formal group over ring, which may be called a formal group over Hopf algebra (FGoHA). The first example of FGoHA was f…
math.AT2001
Logarithms of formal groups over Hopf algebras
A. V. Ershov
The aim of this paper is to prove the following result. For any commutative formal group which is considered as a formal group over $H_\mathbb{Q…