Quadratic Base Change and the Analytic Continuation of the Asai L-function: A new Trace formula approach

Details Quadratic Base Change and the Analytic Continuation of the Asai L-function: A new Trace formula approach Quadratic Base Change and the Analytic Continuation of the Asai L-function: A new Trace formula approach

2010-08-23

arxiv.org/abs/1008.3921v2

Mathematics

Number Theory

33 pages. Submitted. Includes section on using the Hecke algebra to match

Scientific paper

Using Langlands's {\it Beyond Endoscopy} idea and analytic number theory techniques, we study the Asai L-function associated to a real quadratic field $\mathbf{K}/\Q.$ If the Asai L-function associated to an automorphic form over $\mathbf{K}$ has a pole, then the form is a base change from $\Q$. We prove this and further prove the analytic continuation of the L-function. This is one of the first examples of using a trace formula to get such information. A hope of Langlands is that general L-functions can be studied via this method.

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