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A purely analytical lower bound for L ( 1 , χ )

Olivier Ramaré (2009)

Annales mathématiques Blaise Pascal

We give a simple proof of L ( 1 , χ ) q 2 ω ( q ) when χ is an odd primitiv quadratic Dirichlet character of conductor q . In particular we do not use the Dirichlet class-number formula.

A quadratic form with prime variables associated with Hecke eigenvalues of a cusp form

Guodong Hua (2022)

Czechoslovak Mathematical Journal

Let f be a normalized primitive holomorphic cusp form of even integral weight k for the full modular group SL ( 2 , ) , and denote its n th Fourier coefficient by λ f ( n ) . We consider the hybrid problem of quadratic forms with prime variables and Hecke eigenvalues of normalized primitive holomorphic cusp forms, which generalizes the result of D. Y. Zhang, Y. N. Wang (2017).

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