Compact
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Compact may refer to:
- Treaty, a diplomatic contract, also known as a compact, pact, accord, treaty, convention, or covenant among parties
- Compact (newspaper), a broadsheet-quality newspaper printed in a tabloid format
- Compact (soap opera), a 1960s British soap opera
- Compact (cosmetics), a case containing one or more of the following, a mirror, pressed powder, and/or a powder puff
- Compact car, a classification of automobile size
- Compact of Free Association whereby the sovereign states of the Federated States of Micronesia, the Republic of the Marshall Islands and the Republic of Palau have entered into as associated states with the United States
[edit] Mathematics
- Compact space, a topological space such that every open cover has a finite subcover
- 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, these associate numbers to sets in such a way that compact sets all get the measure 0
- 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 of a geometric shape
- Quasi-compact morphism, a morphism of schemes for which the inverse image of any quasi-compact open set is again quasi-compact
[edit] Physics
- Compact star, also called a compact object, a degenerate star like a neutron star
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