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...on field of the corresponding quotient, i.e., it is a Hauptmodul for the [[modular curve]] ''X''(2). Over any point &tau;, its value can be described as a [[ ...ull modular group <math>SL_2(\mathbb{Z})</math>, and it is in fact Klein's modular [[j-invariant]]. ...

[[Category:Modular forms]] ...

...alled theta constants.) These can be used to define a variety of [[modular forms]], and to parametrize certain curves; in particular, the '''Jacobi identity ...as adding {{sfrac|1|2}} to {{mvar|z}} ({{math|''n'' ≡ ''n''² [[Modular arithmetic|mod]] 2}}). For the second, let ...

* {{math|''α''}}, the ''[[modular angle]]'' ...mentary parameter'', the ''complementary modulus,'' or the ''complementary modular angle''. These are further defined in the article on [[quarter period]]s. ...

...)|plane]] (see figure). Ellipses have many similarities with the other two forms of conic sections, [[parabola]]s and [[hyperbola]]s, both of which are [[op == Polar forms == ...

...er, are [[rational number]]s and play an important role in the theory of [[modular form]]s. Many generalizations of the Riemann zeta function, such as [[Diric ...

...function, whether applied to [[real number]]s or [[complex number]]s. The modular [[discrete logarithm]] is another variant; it has uses in [[public-key cryp [[logarithmic form|Logarithmic one-forms]] {{math|''df''/''f''}} appear in [[complex analysis]] and [[algebraic geom ...