8,099 reputation
21153
bio website tetori.blog.me
location South Korea
age 19
visits member for 1 year, 8 months
seen 2 hours ago

I am not good at English, so any correction of grammatical error would be welcomed.

Pushup is too hard :(


Aug
27
revised Solutions to Topology by Munkres
This question requests finding solution.
Aug
25
reviewed Reject suggested edit on Prove that $f(A\cap {B})\subseteq {f(A)\cap {f(B)}}$
Aug
25
comment The topology generated by open intervals of rational numbers
Your space is connected - every open set in your space is $\Bbb{R}$ or at most countable. On the other hand, every closed set in your space is $\varnothing$ or uncountable so there is no nontrivial clopen set.
Aug
25
answered Connectedness and non-local-connectedness of a subspace of $\mathbb R^2$
Aug
10
comment How to find the area of intersection of two circles using axiomatic geometry?
You must improve the question. (For example, you can make the question clearly.) If you modify the question properly, the question will be reopened.
Aug
10
reviewed Reject suggested edit on How to evaluate trigonometric function sine?
Aug
10
revised How to find the area of intersection of two circles using axiomatic geometry?
minor edit
Aug
6
revised Meaning of $\mathbb{R}^0$, $\mathbb{R}^{1/3}$, and $\mathbb{R}^{-2}$.
added 12 characters in body
Aug
6
accepted Question about cardinals in ZF
Aug
6
revised Question about cardinals in ZF
edited body
Aug
6
asked Question about cardinals in ZF
Jul
29
revised Uncountable models for integers
minor modification
Jul
20
reviewed Approve suggested edit on How to prove $\int_0^\pi \frac{dx}{2+2\sin x+\cos x}=\log3$?
Jul
20
answered How to prove $\int_0^\pi \frac{dx}{2+2\sin x+\cos x}=\log3$?
Jul
19
comment Logic Inference Challenge
@KijdjASD Yes. This `inference rule' has a counterexample, and I show that there is a such counterexample.
Jul
19
revised The Continuum Hypothesis & The Axiom of Choice
Modify link.
Jul
19
reviewed Close why is algebraic multiplicity always equal to the geometric multiplicity of distinct eigen values corresponding to Symmetric matrices?
Jul
19
revised Logic Inference Challenge
added 8 characters in body
Jul
19
revised Montgomery&Vaughan's Multiplicative number theory theorem 13.3
minor modification
Jul
19
answered Logic Inference Challenge