Erf -- from Wolfram MathWorld
is the "error function" encountered in integrating the normal distribution (which is a normalized form of the Gaussian function). It is an entire function defined by Note that some authors (e.g., Whittaker and Watson 1990, p. 341) define without the leading factor of . Erf is implemented in the Wolfram Language as Erf[z]. A two-argument form giving is also implemented as Erf[z0, z1]. Erf satisfies
Uniform Product Distribution -- from Wolfram MathWorld
The distribution of the product of uniform variates on the interval can be found directly as
Barycentric Coordinates -- from Wolfram MathWorld
Barycentric coordinates are triples of numbers corresponding to masses placed at the vertices of a reference triangle . These masses then determine a point , which is the geometric centroid of the three masses and is identified with coordinates . The vertices of the triangle are given by , , and . Barycentric coordinates were discovered by Möbius in 1827 (Coxeter 1969, p. 217; Fauvel et al. 1993).
Benford's Law -- from Wolfram MathWorld
A phenomenological law also called the first digit law, first digit phenomenon, or leading digit phenomenon. Benford's law states that in listings, tables of statistics, etc., the digit 1 tends to occur with probability , much greater than the expected 11.1% (i.e., one digit out of 9). Benford's law can be observed, for instance, by examining tables of logarithms and noting that the first pages ar
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Graph Complement -- from Wolfram MathWorld
Independent Vertex Set -- from Wolfram MathWorld
Maxcut -- from Wolfram MathWorld
Chebyshev Inequality -- from Wolfram MathWorld
Shear Matrix -- from Wolfram MathWorld
Mod -- from Wolfram MathWorld
Quotient -- from Wolfram MathWorld
Nearest Integer Function -- from Wolfram MathWorld
Regular Polygon -- from Wolfram MathWorld
Maximum -- from Wolfram MathWorld
Collinear -- from Wolfram MathWorld
Cyclic Quadrilateral -- from Wolfram MathWorld
Tangential Quadrilateral -- from Wolfram MathWorld
Quadrilateral -- from Wolfram MathWorld