The primary goal of this work is to construct $p$-adic families of modular forms of half-integral weight, by using Waldspurger's automorphic framework to make the results as comprehensive and precise as possible. A secondary goal is to clarify the role of test vectors as defined by Gross-Prasad in the elucidation of general formulae for the Fourier coefficients of modular forms of half-integral weight in terms of toric periods of the corresponding modular forms of integral weight. As a consequence of our work, we develop a generalization of a classical formula due to Shintani, and make precise the conditions under which Shintani's lift vanishes. We also give a number of results on test vectors for ramified representations which are of independent interest.

About the Author
V. Vatsal, University of British Columbia, Vancouver, British Columbia, Canada.


Book Information
ISBN 9781470465506
Author V. Vatsal
Format Paperback
Page Count 95
Imprint American Mathematical Society
Publisher American Mathematical Society