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Mathematics
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Apostolos
  • Member for 14 years
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26
Do sets, whose power sets have the same cardinality, have the same cardinality?
Mar 27, 2011
question
19
Polish Spaces and the Hilbert Cube
Jan 28, 2011
question
16
Is the sentence "$(A,\in)\models ZFC$" absolute?
Feb 25, 2011
answer
16
Prove 7 divides $15^n+6$ with mathematical induction
Feb 16, 2011
answer
15
Prove that $\beta \rightarrow \neg \neg \beta$ is a theorem using standard axioms 1,2,3 and MP
Oct 1, 2010
answer
14
Naive set theory question on "="
Mar 2, 2011
answer
13
Proving that for infinite $\kappa$, $|[\kappa]^\lambda|=\kappa^\lambda$
Feb 23, 2013
answer
12
An Exercise in Kunen (A Model for Foundation, Pairing,...)
Jun 27, 2013
answer
11
Cofinality and its Consequences
Mar 4, 2011
answer
11
Conditions Equivalent to Injectivity
Nov 5, 2011
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How to decompose an infinite set into two isomorphic ones without choice?
9
$\Pi_0^1$-weakly indescribable cardinals are exactly the regulars