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Topic: Question related to "Foundations of Mathematics"
Replies: 2   Last Post: Apr 2, 2012 1:00 PM

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Posts: 3
Registered: 3/10/12
Question related to "Foundations of Mathematics"
Posted: Mar 10, 2012 12:20 PM
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I made up it, I didn't find anything about it, so I need help.

The question is: How do different set theories handle the following

U := {x : (x belongs_to A) and ( Not(A is_included_in Powerset(
EmptySet)) )}

If possible in the set theory, require (A is_set). But it doesn't
really matter.

The set U is interesting for some reasons.

The answer will help me a lot in my PhD. research.

Thank You.

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