Mitchell order

id: mitchell-order-313-12269488
title: Mitchell order
text: In mathematical set theory, the Mitchell order is a well-founded preorder on the set of normal measures on a measurable cardinal κ. It is named for William Mitchell. We say that M ◅ N if M is in the ultrapower model defined by N. Intuitively, this means that M is a weaker measure than N. In fact, the Mitchell order can be defined on the set of extenders for κ; but if it is so defined it may fail to be transitive, or even well-founded, provided κ has sufficiently strong large cardinal properties.
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category slug: encyclopedia
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original url: https://en.wikipedia.org/wiki/Mitchell_order
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date modified: 2023-06-26T08:18:33Z
main entity: {"identifier":"Q6881463","url":"https://www.wikidata.org/entity/Q6881463"}
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