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jaakov
Posts:
11
Registered:
12/3/12
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Given a set , is there a disjoint set with an arbitrary cardinality?
Posted:
Dec 3, 2012 9:21 AM
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Dear all:
Given a set X and a cardinal k, is there a set Y such that card(Y)=k and
X is disjoint from Y?
Is there a proof of this fact that works without the axiom of regularity
(= axiom of foundation) and does not assume purity of sets?
Thanks in advance
Jaakov.
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