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.

Author dc:creator

• Xiang, Zhengyu

• Mathematics
• Eigenvalues
• Cohomology operations
• Automorphisms

Language dc:language

English

DOI dc:identifier

https://doi.org/10.7916/D8H41ZKN

OAI identifier oai:identifier

oai:academiccommons.columbia.edu:10.7916/D8H41ZKN