Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » sci.math.* » sci.math.independent

Topic: Size of ordinal for ordinal definable real
Replies: 8   Last Post: Dec 29, 2013 11:49 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Aatu Koskensilta

Posts: 2,631
Registered: 6/28/08
Re: Size of ordinal for ordinal definable real
Posted: Dec 29, 2013 10:15 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

Peter Percival <peterxpercival@hotmail.com> writes:

> Please tell us the proper definition!

A set A is ordinal definable if there is a formula P(y, x1, ..., xn)
such that A = {y | P(y, a1, ..., an)} for some ordinals a1, ..., an.

--
Aatu Koskensilta (aatu.koskensilta@uta.fi)

"Wovon man nicht sprechen kann, darüber muss man schweigen"
- Ludwig Wittgenstein, Tractatus Logico-Philosophicus



Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.