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Compact

(Redirected from Compactness)

Several specialized usages of the terms compact and compactness exist.

Multiple definitions of the term "compact" are found in mathematics:
- The most common usage relates to topology, where one considers compact spaces. That article also includes the closely related notion of a compact set.
- The compactness theorem is a key theorem in the formal logic of propositional and predicate calculus.
- In order theory and domain theory, the different (though not entirely unrelated) notion of a compact element is typically used.
Compact flash is a type of data storage device.
Compact car is an automobile size class in the American market.
Compact disc is an optical disc used to store digital data, originally developed for storing digital audio.
A British newspaper term, see compact (newspaper).

Last updated: 08-04-2005 18:33:13

10-26-2009 08:16:03
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