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# Questions

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### How elementary can we go?

jul 28 11 at 23:36 Joel David Hamkins 75.5k8188347

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### $\Delta^0_{\alpha}$ universal sets does not exist

oct 9 11 at 21:16 alephomega 1,7211619

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jul 3 at 6:56 Asaf Karagila 7,24311444

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### What sort of large cardinal can $\aleph_1$ be without the axiom of choice?

feb 3 12 at 18:44 Asaf Karagila 7,24311444

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### For models of ZF, if for some $A$ we have $L[A] = L$, what can we deduce about $A$?

jul 20 11 at 0:25 Joel David Hamkins 75.5k8188347

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### On the large cardinals foundations of categories

may 14 at 21:34 Zhen Lin 1,8251511

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### The transcendence degree of $\mathbb R$ after adding a Cohen

apr 2 at 11:40 Joel David Hamkins 75.5k8188347

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### What is $\omega_1^{CK}(\mathsf{Ord})$?

dec 18 at 0:23 Asaf Karagila 7,24311444

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### Why does the Solovay-Tennenbaum theorem work?

dec 3 at 1:30 Andreas Blass 33k455110

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