On values of a modular form on Γ₀(N)
D. Choi (2006)
Acta Arithmetica
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D. Choi (2006)
Acta Arithmetica
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R. W. K. Odoni (1985)
Banach Center Publications
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Besser, Amnon (1997)
Documenta Mathematica
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Hidegoro Nakano (1968)
Studia Mathematica
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(2013)
Acta Arithmetica
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The classical modular equations involve bivariate polynomials that can be seen to be univariate in the modular invariant j with integer coefficients. Kiepert found modular equations relating some η-quotients and the Weber functions γ₂ and γ₃. In the present work, we extend this idea to double η-quotients and characterize all the parameters leading to this kind of equation. We give some properties of these equations, explain how to compute them and give numerical examples.
J. Hoffstein, D., Friedberg, S. Bump (1990)
Inventiones mathematicae
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Min Ho Lee (2008)
Commentationes Mathematicae Universitatis Carolinae
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We consider a class of linear ordinary differential equations determined by a modular form of weight one, and construct vector-valued modular forms of weight two by using solutions of such differential equations.
Sunder Sal (1965)
Mathematische Zeitschrift
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Heima Hayashi (2006)
Acta Arithmetica
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Karen Taylor (2012)
Acta Arithmetica
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Tsuneo Arakawa (1983)
Manuscripta mathematica
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Dohoon Choi, YoungJu Choie, Toshiyuki Kikuta (2013)
Acta Arithmetica
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Suppose that f is an elliptic modular form with integral coefficients. Sturm obtained bounds for a nonnegative integer n such that every Fourier coefficient of f vanishes modulo a prime p if the first n Fourier coefficients of f are zero modulo p. In the present note, we study analogues of Sturm's bounds for Siegel modular forms of genus 2. As an application, we study congruences involving an analogue of Atkin's U(p)-operator for the Fourier coefficients of Siegel modular forms of genus...
Winfried Kohnen (2004)
Acta Arithmetica
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