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20182026
most citedRational Hypergeometric Ramanujan Identities for : Survey and Generalizations

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math.NT2026

The Shimura Lift and Hilbert Modular Forms

Henri Cohen

After recalling basic formulas concerning modular forms of half-integral weight, Gegenbauer polynomials, and Rankin--Cohen brackets, we give four versions of the Shimura lift and s…

math.NT2026

On the Argument of the Lerch, Chowla--Selberg Formula and CM Values of

Henri Cohen

We give a completely explicit Lerch, Chowla--Selberg formula without absolute values of the Dedekind eta function, and give some applications, in particular to the argument of indi…

math.NT2022

Elementary Continued Fractions for Linear Combinations of Zeta and L Values

Henri Cohen

We show how to obtain infinitely many continued fractions for certain Z-linear combinations of zeta and L values. The methods are completely elementary.

math.NT2021

Factorizations of Eisenstein Series of Level up to 4

Henri Cohen

We show that the most standard Eisenstein series such as or , and also the function , are in a natural way the product of two conjugate Eisenstein…

math.NT20211 cited

Rational Hypergeometric Ramanujan Identities for : Survey and Generalizations

Henri Cohen, Jesús Guillera

We give a simple unified proof for all existing rational hypergeometric Ramanujan identities for , and give a complete survey (without proof) of several generalizations: ratio…

math.NT2021

Computing L-Functions of Quadratic Characters at Negative Integers

Henri Cohen

We survey a number of different methods for computing for a Dirichlet character , with particular emphasis on quadratic characters. The main conclusion is that when $…