PlanetMath:

(more info)

Math for the people, by the people.

donor list - find out how

Main Menu

Encyclopedia by subject

03E05 - Mathematical logic and foundations :: Set theory :: Other combinatorial set theory

another proof of pigeonhole principle owned by ratboy antichain owned by Henry Aronszajn tree owned by Henry arrows relation owned by Henry branch owned by Henry Erdős-Rado theorem owned by Henry example of Aronszajn tree owned by Henry example of tree (set theoretic) owned by uzeromay ordered tree owned by CWoo pigeonhole principle owned by djao proof of pigeonhole principle owned by Wkbj79 proof that $\omega$ has the tree property owned by Henry Suslin tree owned by Henry tree (set theoretic) owned by Henry
Show empty categories:
[ up \| top ]