On heights of -adic dynamical systems

Author:
Hua-Chieh Li

Journal:
Proc. Amer. Math. Soc. **130** (2002), 379-386

MSC (2000):
Primary 11S99; Secondary 11S31, 14S05

DOI:
https://doi.org/10.1090/S0002-9939-01-06166-4

Published electronically:
July 25, 2001

MathSciNet review:
1862116

Full-text PDF

Abstract | References | Similar Articles | Additional Information

When we consider the properties of the iterates of a noninvertible endomorphism of a formal group, all the roots of iterates of the endomorphism are simple and the full commuting family contains both invertible and noninvertible series. Experimental evidence seems to suggest that for an invertible series to commute with a noninvertible series with only simple roots of iterates, two such commuting power series must be endomorphisms of a single formal group. Lubin proposed four conjectures to support this conjecture. In this paper, we provide answers to these four conjectures.

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Additional Information

**Hua-Chieh Li**

Affiliation:
Department of Mathematics, National Tsing Hua University, Hsin Chu, Taiwan, Republic of China

Address at time of publication:
Department of Mathematics, National Taiwan Normal University, Taipei, Taiwan, Republic of China

Email:
li@math.nthu.edu.tw

DOI:
https://doi.org/10.1090/S0002-9939-01-06166-4

Received by editor(s):
July 18, 2000

Published electronically:
July 25, 2001

Communicated by:
David E. Rohrlich

Article copyright:
© Copyright 2001
American Mathematical Society