Theses Doctoral

Eigenvarieties and twisted eigenvarieties

Xiang, Zhengyu

For an arbitrary reductive group G, we construct the full eigenvariety E, which parameterizes all p-adic overconvergent cohomological eigenforms of G in the sense of Ash-Stevens and Urban. Further, given an algebraic automorphism a of G, we construct the twisted eigenvariety E^a, a rigid subspace of E, which parameterizes all eigenforms that are invariant under a. In particular, in the case G = GLn, we prove that every self-dual automorphic representation can be deformed into a family of self-dual cuspidal forms containing a Zariski dense subset of classical points. This is the inverse of Ash-Pollack-Stevens conjecture. We also give some hint to this conjecture.


  • thumnail for Xiang_columbia_0054D_10687.pdf Xiang_columbia_0054D_10687.pdf application/pdf 548 KB Download File

More About This Work

Academic Units
Thesis Advisors
Urban, Eric Jean-Paul
Ph.D., Columbia University
Published Here
May 3, 2012