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Thursday, January 19, 2017

**Abstract:** Any one dimensional formal group law over $\mathbb{Z}_p$ is uniquely determined by the series expansion of its multiplication by $p$ map. This talk addresses the converse question: when does an endomorphism $f$ of the $p$-adic formal disk arise as the multiplication by $p$-map of a formal group? Lubin, who first studied this question, observed that if such a formal group were to exist, then $f$ would commute with an automorphism of infinite order. He formulated a conjecture under which a commuting pair of series should arise from a formal group. Using methods from p-adic Hodge theory, we prove the height one case of this conjecture.

Tuesday, January 24, 2017

Thursday, February 2, 2017

Thursday, February 9, 2017

Thursday, February 23, 2017

Tuesday, February 28, 2017

Thursday, March 2, 2017

Thursday, March 9, 2017

Tuesday, March 14, 2017

Thursday, March 16, 2017

Thursday, March 30, 2017

Thursday, April 6, 2017

Tuesday, April 11, 2017

Thursday, April 13, 2017

Thursday, April 20, 2017

Thursday, April 27, 2017

Tuesday, May 2, 2017

Friday, May 5, 2017

Tuesday, May 9, 2017

Tuesday, June 20, 2017

Tuesday, July 18, 2017

Thursday, August 31, 2017

Thursday, September 7, 2017

Thursday, September 14, 2017

Thursday, September 21, 2017

Tuesday, September 26, 2017

Thursday, September 28, 2017