2 papers
math.NT2011
Galois Extensions of Height-One Commuting Dynamical Systems
Ghassan Sarkis, Joel Specter
We consider a dynamical system consisting of a pair of commuting power series, one noninvertible and another nontorsion invertible, of height one with coefficients in the -adic…
math.NT2006
Extrinsic properties of automorphism groups of formal groups
Jonathan D. Lubin, Ghassan Y. Sarkis
We prove two conjectures on the automorphism group of a one-dimensional formal group law defined over a field of positive characteristic. The first is that if a series commutes wit…