Compact (disambiguation)

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Look up compact in Wiktionary, the free dictionary.

Compact may mean:

• Compact (newspaper), a broadsheet-quality newspaper printed in a tabloid format
• Compact (soap opera), a 1960s British soap opera
• a diplomatic contract or covenant among parties, sometimes known as pact, treaty, or an interstate compact
• Compact (cosmetics) A small, typically round case, usually containing one, two or all of the following: a mirror, pressed powder, and/or a powder puff
• Compact car
• "The Compact," a region of space inhabited by fictional aliens in The Chanur novels by C. J. Cherryh.
• Compact of Free Association whereby the sovereign states of the Federated States of Micronesia (FSM), the Republic of the Marshall Islands (RMI) and the Republic of Palau have entered into as associated states with the United States.

[edit] Physics

• Compact object = compact star, a degenerate star like a neutron star

[edit] Mathematics

• Compact space, a topological space such that every open cover has a finite subcover. This corresponds to a closed and bounded subset of a Euclidean space
• Compactness theorem, a set of first-order sentences is satisfiable if every finite subset of it is satisfiable.
• Compact element, those elements of a partially ordered set that cannot be subsumed by a supremum of any directed set that does not already contain them
• measure of non-compactness in functional analysis
• Compact operator, a linear operator that takes bounded subsets to relatively compact subsets, in functional analysis
• Compactness measure of a shape, a numerical quantity representing the compactness (in the common sense) of a geometric shape
• Quasi-compact morphism, in algebraic geometry, a morphism of schemes for which the inverse image of any quasi-compact open set is again quasi-compact

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