Skip to main content
Mathematics
HeroZhang001's user avatar
HeroZhang001's user avatar
HeroZhang001's user avatar
HeroZhang001
  • Member for 1 year, 8 months
  • Last seen this week
  • Henan, China
Profile Activity
Stats
2,664
reputation
8k
reached
43
answers
32
questions
Communities
View all
About

Geometry enthusiast~

A master student is currently studying for a Master of Science degree at Beijing Normal University.

Badges
View all badges
9
gold badges
10
silver badges
24
bronze badges
Top tags
View all tags
21
Score
11
Posts
15
Posts %
19
Score
9
Posts
12
Posts %
18
Score
7
Posts
9
Posts %
12
Score
26
Posts
35
Posts %
5
Score
16
Posts
21
Posts %
5
Score
11
Posts
15
Posts %
Top posts
View all questions and answers
9
Use of $\sum_{r=1}^{\infty} \frac{1}{r^2} = \frac{\pi^2}{6} $ in evaluating $I$
May 14, 2023
8
Assume $\int_0^\infty f(x)dx$ converges. Prove there exists $\xi\in[1,\infty)$ such that $\int_1^\infty \frac{f(x)}x dx=\int_1^\xi f(x)dx$.
Sep 3, 2023
8
Why $1− \frac12 + \frac13 − \frac14 + \frac15 - \cdots$ is not zero but $\ln2$
Jun 1, 2023
6
Product vs. join of subgroups of a finite group
Apr 27, 2023
4
Computing the De Rham Cohomology Group of Connected Sum $H_{\rm dR}^p(M_1 \# M_2)$
Dec 4, 2022
4
Is $\{(\mathbb R,\phi)\}$ a smooth atlas for $\mathbb R$, where $\phi(x)=\left\{ \begin{array}{ll} x & x<0, \\ 2x& x\geq0~? \end{array} \right.$
Mar 1, 2023
4
Solution Verification: Compute $\int_{0}^{+\infty} \frac{\mathrm{e}^{-a x}-\mathrm{e}^{-b x}}{x} \sin x \mathrm{~d} x$, where $b>a>0$
Mar 5, 2023
4
Is $2^{2+4n}+1$ divisible by $5$?
May 16
4
A functional equation with functions of class $C^{1}(\mathbb{R})$
May 11
4
Please tell me why my method of solving $\sin\left(\frac{\pi}{3}-2\,x\right)-\sin\left(6\,x\right)=2$ is not correct.
Jan 29, 2023