Weierstrass functions
Mathematical functions related to Weierstrass's elliptic function / From Wikipedia, the free encyclopedia
For the fractal continuous function without a defined derivative, see Weierstrass function.
In mathematics, the Weierstrass functions are special functions of a complex variable that are auxiliary to the Weierstrass elliptic function. They are named for Karl Weierstrass. The relation between the sigma, zeta, and functions is analogous to that between the sine, cotangent, and squared cosecant functions: the logarithmic derivative of the sine is the cotangent, whose derivative is negative the squared cosecant.