<*mathematics*> 1. Bigger than any natural number. There are
various formal set definitions in set theory: a set X is
infinite if

(i) There is a bijection between X and a proper subset of X.

(ii) There is an injection from the set N of natural numbers to X.

(iii) There is an injection from each natural number n to X.

These definitions are not necessarily equivalent unless we accept the Axiom of Choice.

2. The length of a line extended indefinitely.

See also infinite loop, infinite set.

Last updated: 1995-03-29

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**Nearby terms:**
inference engine « inference rule « infimum « **infinite** » Infinite Impulse Response » infinite loop » Infinite Monkey Theorem

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Copyright Denis Howe 1985