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  2. Theta function - Wikipedia

    en.wikipedia.org/wiki/Theta_function

    There are several closely related functions called Jacobi theta functions, and many different and incompatible systems of notation for them. One Jacobi theta function (named after Carl Gustav Jacob Jacobi) is a function defined for two complex variables z and τ, where z can be any complex number and τ is the half-period ratio, confined to the upper half-plane, which means it has a positive ...

  3. Category:Theta functions - Wikipedia

    en.wikipedia.org/wiki/Category:Theta_functions

    Download QR code; Print/export Download as PDF; Printable version; In other projects ... Pages in category "Theta functions" The following 16 pages are in this ...

  4. Ramanujan theta function - Wikipedia

    en.wikipedia.org/wiki/Ramanujan_theta_function

    In mathematics, particularly q-analog theory, the Ramanujan theta function generalizes the form of the Jacobi theta functions, while capturing their general properties. In particular, the Jacobi triple product takes on a particularly elegant form when written in terms of the Ramanujan theta. The function is named after mathematician Srinivasa ...

  5. Jacobi theta functions (notational variations) - Wikipedia

    en.wikipedia.org/wiki/Jacobi_theta_functions...

    Download QR code; Print/export Download as PDF; Printable version; In other projects ... There are a number of notational systems for the Jacobi theta functions. The ...

  6. Neville theta functions - Wikipedia

    en.wikipedia.org/wiki/Neville_theta_functions

    The Neville theta functions are related to the Jacobi elliptic functions. If pq(u,m) is a Jacobi elliptic function (p and q are one of s,c,n,d), then If pq(u,m) is a Jacobi elliptic function (p and q are one of s,c,n,d), then

  7. Theta function of a lattice - Wikipedia

    en.wikipedia.org/wiki/Theta_function_of_a_lattice

    Furthermore, the theta function of an even unimodular lattice of rank n is actually a modular form of weight n/2. The theta function of an integral lattice is often written as a power series in q = e 2 i π τ {\displaystyle q=e^{2i\pi \tau }} so that the coefficient of q n gives the number of lattice vectors of norm 2 n .

  8. Riemann–Siegel theta function - Wikipedia

    en.wikipedia.org/wiki/Riemann–Siegel_theta...

    In mathematics, the Riemann–Siegel theta function is defined in terms of the gamma function as = ⁡ ((+)) ⁡for real values of t.Here the argument is chosen in such a way that a continuous function is obtained and () = holds, i.e., in the same way that the principal branch of the log-gamma function is defined.

  9. Jacobi triple product - Wikipedia

    en.wikipedia.org/wiki/Jacobi_triple_product

    The Jacobi Triple Product also allows the Jacobi theta function to be written as an infinite product as follows: Let x = e i π τ {\displaystyle x=e^{i\pi \tau }} and y = e i π z . {\displaystyle y=e^{i\pi z}.}