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Hanul Jeon
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About

I am Hanul Jeon. I am currently (since 25 August 2021) a doctoral student at Cornell University. Contact me via e-mail or my Twitter account if you want to say something to me. (My e-mail address is available on my website.)

If you find any grammatical errors or suspicious facts from my comments or answers, please let me know.

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12
Translation of "The joy of learning" by Hironaka
Feb 4
11
Is axiom of constructibility $V = L$ consistent with Tarski–Grothendieck set theory?
Oct 29 '20
11
Is the existence of double complement of a set provable in Intuitionistic ZF?
Apr 3 '18
8
Reference request: proof-theoretic strength of $\mathsf{KP}$ with recursively large ordinals and $\mathsf{CZF}$ with large set axioms
Dec 26 '20
8
Realizability for constructive Zermelo-Fraenkel set theory
Jul 14
8
(ZC + $\Sigma_2$ replacement + inaccessible cardinal) equiconsistent with (ZFC + inaccessible cardinal)?
Nov 26 '19
7
Is there an abstract logic that defines the mantle?
Jul 24 '20
7
Consistency strength of the existence of a transitive model of $\mathsf{ZFC}^-$ with a $\kappa$-complete ultrafilter
Mar 6 '18
6
Models of $\mathsf{ZF^-_2}$ over $\mathsf{ZF}$
Nov 22 '20
6
Axiom of choice and the equality between second-order constructible universe and HOD
Feb 19 '15
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80
which is larger number? $\sqrt{7}-\sqrt{6}$ or $\sqrt{6}-\sqrt{5}$
49
Convergence of Ratio Test implies Convergence of the Root Test
35
The series $\sum_{n=1}^{+\infty}\frac{1}{1^2+2^2+\cdots+n^2}.$
31
Does $\bigcap_{n=1}^{+\infty}(-\frac{1}{n},\frac{1}{n}) = \varnothing$?
27
Is the function $ f(x,y)=\frac{xy}{x^{2}+y^{2}}$ where $f(0,0)$ is defined to be $0$ continuous?

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