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A grouping of statistics.

A group given by G/phi(G), where phi(G) is the Frattini subgroup of a given group G.

The polynomials in the diagonal of the Smith normal form or rational canonical form of a matrix are called its invariant factors.

The distance a point moves due to shear divided by the perpendicular distance of a point from the invariant line.

A 1-factor of a graph G with n graph vertices is a set of n/2 separate graph edges which collectively contain all n of the graph vertices of G among their endpoints.

Writing a Fourier series as f(theta)=1/2a_0+sum_(n=1)^(m-1)sinc((npi)/(2m))[a_ncos(ntheta)+b_nsin(ntheta)], where m is the last term, reduces the Gibbs phenomenon. The ...

A quantity which transforms like a tensor except for a scalar factor of a Jacobian.

Each prime factor p_i^(alpha_i) in an integer's prime factorization is called a primary.

A factor of a polynomial P(x) of degree n is a polynomial Q(x) of degree less than n which can be multiplied by another polynomial R(x) of degree less than n to yield P(x), ...

A complex magnification is a map of the form z|->az, where a is a positive real number, which corresponds to magnification about the origin of points in the complex plane by ...