### 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[[f^{n}(x)]] for all n ∈ N. We shall prove that the converse of this statement is also true.

Original language | English |
---|---|

Pages (from-to) | 2325-2329 |

Number of pages | 5 |

Journal | Proceedings of the American Mathematical Society |

Volume | 124 |

Issue number | 8 |

DOIs | |

Publication status | Published - 1996 Jan 1 |

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### ASJC Scopus subject areas

- Mathematics(all)
- Applied Mathematics

### Cite this

**When is a p-adic power series an endomorphism of a formal group?** / Li, Hua-Chieh.

Research output: Contribution to journal › Article

*Proceedings of the American Mathematical Society*, vol. 124, no. 8, pp. 2325-2329. https://doi.org/10.1090/S0002-9939-96-03308-4

}

TY - JOUR

T1 - When is a p-adic power series an endomorphism of a formal group?

AU - Li, Hua-Chieh

PY - 1996/1/1

Y1 - 1996/1/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=21344448776&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=21344448776&partnerID=8YFLogxK

U2 - 10.1090/S0002-9939-96-03308-4

DO - 10.1090/S0002-9939-96-03308-4

M3 - Article

AN - SCOPUS:21344448776

VL - 124

SP - 2325

EP - 2329

JO - Proceedings of the American Mathematical Society

JF - Proceedings of the American Mathematical Society

SN - 0002-9939

IS - 8

ER -