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A spanning tree of a graph on n vertices is a subset of n-1 edges that form a tree (Skiena 1990, p. 227). For example, the spanning trees of the cycle graph C_4, diamond ...

The p-adic norm satisfies |x+y|_p<=max(|x|_p,|y|_p) for all x and y.

An alternative spelling of the name "Chebyshev."

A technique is a specific method of performing an operation. The terms algorithm, method, and procedure are also used interchangeably.

One of the 14 4-polyaboloes.

The trilinear quotient of two points p:q:r and u:v:w is the point p/u:q/v:r/w.

A transformation of the form A^'=UAU^(H), where U^(H) denotes the conjugate transpose.

A homogeneous ideal defining a projective algebraic variety is unmixed if it has no embedded prime divisors.

A formula whose truth table contains only false in any interpretation is called unsatisfiable.

A k-chain whose bounding (k-1)-chain vanishes.