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The length is the longest dimension of an object.

A level set in three dimensions.

Random walk trajectories which are composed of self-similar jumps. They are described by the Lévy distribution.

D^*Dpsi=del ^*del psi+1/4Rpsi, where D is the Dirac operator D:Gamma(S^+)->Gamma(S^-), del is the covariant derivative on spinors, and R is the scalar curvature.

Little-omega notation is the inverse of the Landau symbol o, i.e., f(n) in o(phi(n)) <==> phi(n) in omega(f(n)).

The term "maths" is the usual term for "mathematics" used in the United Kingdom. In contrast, the term "math" is used in the United States.

The result of a matrix multiplication.

For every infinite loop space machine E, there is a natural equivalence of spectra between EX and Segal's spectrum BX.

The nth-order Menger sponge graph is the connectivity graph of cubes in the nth iteration of the Menger sponge fractal. The first two iterations are shown above. The n-Menger ...

The minimum excluded value. The mex of a set S of nonnegative integers is the least nonnegative integer not in the set.