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A system of equations is any set of simultaneous equations.

Also called indiscrete topology, the trivial topology is the smallest topology on a set X, namely the one in which the only open sets are the empty set and the entire set X. ...

The Euler-Gergonne-Soddy triangle is the right triangle DeltaZFlEv created by the pairwise intersections of the Euler line L_E, Soddy line L_S, and Gergonne line L_G. (The ...

A pivotal isocubic is an isocubic on the lines connecting pairs of isoconjugates that pass through a fixed point P (the pivot point). Pivotal isocubics intersect the ...

The smallest statistical rank (either up or down) of a set of data.

The set of rules for manipulating and calculating with tensors.

The unitary group U_n(q) is the set of n×n unitary matrices.

A subgraph G^' of a graph G is a graph G^' whose vertex set and edge set are subsets of those of G. If G^' is a subgraph of G, then G is said to be a supergraph of G^' ...

An open connected set is called a region (sometimes also called a domain).

A relation R on a set S is transitive provided that for all x, y and z in S such that xRy and yRz, we also have xRz.