Θ函数
数学中，Θ函数是一种多复变特殊函数。其应用包括阿贝尔簇与模空间、二次形式、孤立子理论；其格拉斯曼代数推广亦出现于量子场论，尤其于超弦与D-膜理论。
Θ函数最常见于椭圆函数理论。相对于其「z」 变量，Θ函数是拟周期函数（quasiperiodic function），具有「拟周期性」。在一般下降理论（descent theory）中，此来自线丛条件。
Theta function
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Theta function Θ函数
In mathematics, theta functions are special functions of several complex variables. They are important in many areas, including the theories of abelian varieties and mo**** spaces, and of quadratic forms. They have also been applied to soliton theory. When generalized to a Grassmann algebra, they also appear in quantum field theory.