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Mathematics
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NikS
  • Member for 1 year, 11 months
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6
Is "first-orderizability" a requirement for "legitimate" mathematical reasoning?
Apr 1
6
Is closure of an open subset of $\mathbb{R}$ always a countable union of closed intervals?
Sep 4, 2023
5
Which countable ordinals are common to every $\omega$-model of ZF?
Jul 11, 2023
4
Is the ordered pair definition $(𝑥,𝑦):=\{𝑥,\{𝑥,𝑦\}\}$ a good definition?
May 25
4
Set Universes and von Neumann Hierarchy
Nov 3, 2022
4
Assuming "standard $\omega$" in ZF(C) universe
Mar 27, 2023
4
Is "standard $\mathbb{N}$" in fact not "fully formalizable"?
Dec 22, 2023
4
Why is it not important what mathematical objects are?
Jan 24, 2023
3
Is everything an object in Math, just like in Objected-Oriented Programming? (Tao's Analysis I)
Jun 4
3
On the limitations(?) of first-order logic in mathematical reasoning
May 8
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