Cofinal may refer to:
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Cofinal (mathematics)
In mathematics, a subset B \subseteq A of a preordered set (A, \leq) is said to be cofinal or frequent in A if for every a \in A, it is possible to find an element b in B that dominates a (formally, a\leq b).
Cofinal subsets are very important i ...
, the property of a subset ''B'' of a preordered set ''A'' such that for every element of ''A'' there is a "larger element" in ''B''
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Cofinality
In mathematics, especially in order theory, the cofinality cf(''A'') of a partially ordered set ''A'' is the least of the cardinalities of the cofinal subsets of ''A''. Formally,
:\operatorname(A) = \inf \
This definition of cofinality relies o ...
(mathematics), the least cardinality of a cofinal subset in this sense
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Cofinal (music), a part of some Gregorian chants
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