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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Daeyeol Jeon, Euisung Park (2005)
Acta Arithmetica
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Heima Hayashi (2006)
Acta Arithmetica
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Serge Lang, Daniel S. Kubert (1978)
Mathematische Annalen
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Besser, Amnon (1997)
Documenta Mathematica
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Hidegoro Nakano (1968)
Studia Mathematica
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Arjune Budhram (2002)
Acta Arithmetica
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Ryszard Urbański (1983)
Studia Mathematica
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Masataka Chida (2005)
Acta Arithmetica
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Chang Heon Kim, Ja Kyung Koo (1998)
Acta Arithmetica
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We find a generator of the function field on the modular curve X₁(4) by means of classical theta functions θ₂ and θ₃, and estimate the normalized generator which becomes the Thompson series of type 4C. With these modular functions we investigate some number theoretic properties.
Ryszard Urbanski (1986)
Mathematische Zeitschrift
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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.
Tsz Ho Chan, Igor E. Shparlinski (2010)
Acta Arithmetica
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Matija Kazalicki, Koji Tasaka (2014)
Acta Arithmetica
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Kaneko and Sakai (2013) recently observed that certain elliptic curves whose associated newforms (by the modularity theorem) are given by the eta-quotients can be characterized by a particular differential equation involving modular forms and Ramanujan-Serre differential operator. In this paper, we study certain properties of the modular parametrization associated to the elliptic curves over ℚ, and as a consequence we generalize and explain some of their findings. ...