2012 Theses Doctoral

# Eigenvarieties and twisted eigenvarieties

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.

## Files

- Xiang_columbia_0054D_10687.pdf application/pdf 548 KB Download File

## More About This Work

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