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Proceedings of the London Mathematical Society Advance Access originally published online on October 25, 2007
Proceedings of the London Mathematical Society 2008 96(2):335-366; doi:10.1112/plms/pdm046
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© 2007 London Mathematical Society

On the mean values of L-functions in orthogonal and symplectic families

H. M. Bui and J. P. Keating

School of Mathematics
University of Bristol
Bristol BS8 1TW
United Kingdom
HM.Bui@bristol.ac.uk

Received 12 December 2006. Revision received 11 June 2007.

Hybrid Euler–Hadamard products have previously been studied for the Riemann zeta function on its critical line and for Dirichlet L-functions, in the context of the calculation of moments and connections with Random Matrix Theory. According to the Katz–Sarnak classification, these are believed to represent families of L-function with unitary symmetry. We here extend the formalism to families with orthogonal and symplectic symmetry. Specifically, we establish formulae for real quadratic Dirichlet L-functions and for the L-functions associated with primitive Hecke eigenforms of weight 2 in terms of partial Euler and Hadamard products. We then prove asymptotic formulae for some moments of these partial products and make general conjectures based on results for the moments of characteristic polynomials of random matrices.

2000 Mathematics Subject Classification 11M06.


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