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A nonsimply connected 3-manifold, also called a dodecahedral space.

"Poincaré transformation" is the name sometimes (e.g., Misner et al. 1973, p. 68) given to what other authors (e.g., Weinberg 1972, p. 26) term an inhomogeneous Lorentz ...

The contravariant four-vector arising in special and general relativity, x^mu=[x^0; x^1; x^2; x^3]=[ct; x; y; z], (1) where c is the speed of light and t is time. ...

The curve with trilinear coordinates a^t:b^t:c^t for a given power t.

The partial differential equation u_(tt)-u_(xx)=epsilon(u_t-u_t^3).

Given a sequence of values {a_k}_(k=1)^n, the running maxima are the sequence of values {max(a_1,...,a_k)}_(k=1)^n. So, for example, given a sequence (3,5,7,8,8,5,7,9,2,5), ...

The symbol ; given special meanings in several mathematics contexts, the most common of which is the covariant derivative.

The dual polyhedron of the small dodecicosahedron U_(50) and Wenninger dual W_(90).

A graphical partitioning based on the eigenvalues and eigenvectors of the Laplacian matrix of a graph.

The structure factor S_Gamma of a discrete set Gamma is the Fourier transform of delta-scatterers of equal strengths on all points of Gamma, S_Gamma(k)=intsum_(x in ...