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A rotation combined with an expansion or geometric contraction.

psi=(A_0+alpha_1A_1+alpha_2A_2+...)e^(iS/alpha).

A specific type of ultraproduct that can be used to construct nonstandard universes and obtain the transfer principle as a corollary of Łoś' theorem for ultraproducts.

A set of sample problems in unconstrained optimization is given by loading Optimization`UnconstrainedProblems` and evaluating $FindMinimumProblems.

A statistical distribution such as the normal distribution which has a single "peak."

A ball of radius 1.

Capable of taking on exactly one possible value.

A function of a single variable (e.g., f(x), g(z), theta(xi), etc.).

If A is true unless B, then not-B implies A, but B does not necessarily imply not-A.

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