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Compact
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)
.
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