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.
|頁（從 - 到）||1437-1446|
|期刊||Transactions of the American Mathematical Society|
|出版狀態||已發佈 - 1997|
ASJC Scopus subject areas