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A quantity that is nonzero everywhere is said to be nonvanishing. For instance, the values of x^2+1 are nonvanishing for real x, while those of x^2 are not (since x^2 ...

The term "over" is commonly used in mathematical exposition as a synonym for "in the domain of." So, for example, "Let f be a function over the reals" means "Let f be a ...

A group of five elements.

A specific prescription for carrying out a task or solving a problem. Also called an algorithm, method, or technique

A group of five elements, also called a quintuplet or pentad.

A group of five elements, also called a quintuple or pentad.

The quantity under a radical sign.

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

A set of four, also called a quartet.

A set with three elements.