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Topic: [isabelle] New in the AFP: The Nash–Williams Partition Th...

Email Gateway (Aug 23 2022 at 09:15):

From: Manuel Eberl <eberlm@in.tum.de>
The Nash–Williams Partition Theorem

by Lawrence C. Paulson

In 1965, Nash-Williams discovered a generalisation of the infinite form
of Ramsey's theorem. Where the latter concerns infinite sets of
n-element sets for some fixed n, the Nash-Williams theorem concerns
infinite sets of finite sets (or lists) subject to a “no initial
segment” condition. The present formalisation follows a monograph on
Ramsey Spaces by Todorčević.

https://www.isa-afp.org/entries/Nash_Williams.html

Enjoy,

Manuel

Last updated: Nov 21 2024 at 12:39 UTC