When is a p-adic power series an endomorphism of a formal group?

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Abstract

If f (x) is a noninvertible endomorphism of a formal group, then we have that f (x) commutes with an invertible series and Ō[[x]] is Galois over Ō[[fn(x)]] for all n ∈ N. We shall prove that the converse of this statement is also true.

Original languageEnglish
Pages (from-to)2325-2329
Number of pages5
JournalProceedings of the American Mathematical Society
Volume124
Issue number8
DOIs
Publication statusPublished - 1996 Jan 1

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ASJC Scopus subject areas

  • Mathematics(all)
  • Applied Mathematics

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