-adic power series which commute
Trans. Amer. Math. Soc. 349 (1997), 1437-1446
Primary 11S99; Secondary 11S31, 14L05
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Abstract: When two noninvertible series commute to each other, they have same set of roots of iterates. Most of the results of this paper will be concerned with the problem of which series commute with a given noninvertible series. Our main theorem is a generalization of Lubin's result about isogenies of formal groups.
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Department of Mathematics, National Tsing Hua University, Hsinchu, Taiwan, R.O.C.
Received by editor(s):
June 24, 1994
Received by editor(s) in revised form:
March 22, 1995
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