We obtain the last of the standard Kuznetsov formulas for
. In
the previous paper, we were able to exploit the relationship between the
positive-sign Bessel function and the Whittaker function to apply Wallach’s
Whittaker expansion; now we demonstrate the expansion of functions into
Bessel functions for all four signs, generalizing Wallach’s theorem for
. As
applications, we again consider the Kloosterman zeta functions and smooth sums of
Kloosterman sums. The new Kloosterman zeta functions pose the same difficulties as
we saw with the positive-sign case, but for the negative-sign case, we obtain some
analytic continuation of the unweighted zeta function and give a sort of reflection
formula that exactly demonstrates the obstruction to further continuation arising
from the Kloosterman sums whose moduli are far apart. The completion of the
remaining sign cases means this work now both supersedes the author’s thesis and
completes the work started in the original paper of Bump, Friedberg and
Goldfeld.
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