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A type of integral named after Henstock and Kurzweil. Every Lebesgue integrable function is HK integrable with the same value.

The normal vector, often simply called the "normal," to a surface is a vector which is perpendicular to the surface at a given point. When normals are considered on closed ...

An affine isoperimetric inequality.

An operator in logic which returns either true or false.

Let there be two particularly well-behaved functions F(x) and p_tau(x). If the limit lim_(tau->0)int_(-infty)^inftyp_tau(x)F(x)dx exists, then p_tau(x) is a regular sequence ...

An operator definition of a function. A Rodrigues formula may be converted into a Schläfli integral.

The Schur polynomials are a class of orthogonal polynomials. They are a special case of the Jack polynomials corresponding to the case alpha=1.

psi=(A_0+alpha_1A_1+alpha_2A_2+...)e^(iS/alpha).

Solving the wave equation on a disk gives a solution in terms of Bessel functions.

A function w(x) used to normalize orthogonal functions int[f_n(x)]^2w(x)dx=N_n.