PlanetMath:

(more info)

Math for the people, by the people.

donor list - find out how

Main Menu

Encyclopedia by subject

03E04 - Mathematical logic and foundations :: Set theory :: Ordered sets and their cofinalities; pcf theory

$\operatorname{cf}(\operatorname{cf} \alpha) = \operatorname{cf} \alpha$ owned by yesitis another definition of cofinality owned by x_bas cofinality owned by yark frequently in owned by CWoo maximal element owned by akrowne minimal and maximal number owned by pahio partitions less than cofinality owned by Henry visualizing maximal elements owned by stevecheng
Show empty categories:
[ up \| top ]