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An (n-2)-dimensional face of an n-dimensional polytope.

Euclidean n-space is denoted R^n.

If the fourth moment mu_4!=0, then P(|x^_-mu_4|>=lambda)<=(mu_4+3(N-1)sigma^4)/(N^3lambda^4), where sigma^2 is the variance.

An operator definition of a function. A Rodrigues formula may be converted into a Schläfli integral.

Ruffini's rule a shortcut method for dividing a polynomial by a linear factor of the form x-a which can be used in place of the standard long division algorithm. This method ...

A surface possessing a saddle point.

A position in a game is safe for a player A if the person who plays next (player B) will lose.

The word saltus has two different meanings: either a jump or an oscillation of a function.

The study of sampling

A formula is called satisfiable if it takes at least one true value in some interpretation.