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A NOTE ON SPECIAL VALUES OF CERTAIN DIRICHLET L-FUNCTIONS

Part of: Diophantine equations Zeta and $L$-functions: analytic theory Forms and linear algebraic groups

Published online by Cambridge University Press:  13 October 2010

B. RAMAKRISHNAN
B. RAMAKRISHNAN*
Affiliation:
Harish-Chandra Research Institute, Chhatnag Road, Jhunsi, Allahabad 211 019, India (email: ramki@hri.res.in)
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Abstract

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In Gun and Ramakrishnan [‘On special values of certain Dirichlet L-functions’, Ramanujan J.15 (2008), 275–280], we gave expressions for the special values of certain Dirichlet L-function in terms of finite sums involving Jacobi symbols. In this note we extend our earlier results by giving similar expressions for two more special values of Dirichlet L-functions, namely L(−1,χm) and L(−2,χ−m′), where m,m′ are square-free integers with m≡1 mod 8 and m′≡3 mod 8 and χD is the Kronecker symbol . As a consequence, using the identities of Cohen [‘Sums involving the values at negative integers of L-functions of quadratic characters’, Math. Ann.217 (1975), 271–285], we also express the finite sums with Jacobi symbols in terms of sums involving divisor functions. Finally, we observe that the proof of Theorem 1.2 in Gun and Ramakrishnan (as above) is a direct consequence of Equation (24) in Gun, Manickam and Ramakrishnan [‘A canonical subspace of modular forms of half-integral weight’, Math. Ann.347 (2010), 899–916].

Keywords

Dirichlet L-functionssums of squares

MSC classification

Secondary: 11E25: Sums of squares and representations by other particular quadratic forms 11M06: $zeta (s)$ and $L(s, chi)$ 11D85: Representation problems
Type
Research Article
Information
Bulletin of the Australian Mathematical Society , Volume 83 , Issue 3 , June 2011 , pp. 435 - 438
Copyright
Copyright © Australian Mathematical Publishing Association Inc. 2010

References

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