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zjk
  • Member for 12 years, 2 months
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18 votes
6 answers
1k views

Is this 3D curve a circle?

6 votes
2 answers
523 views

Prove $0, \frac{1}{2}, 0, \frac{1}{3}, \frac{2}{3}, 0, \frac{1}{4}, \frac{2}{4}, ...$ equidistributed in $[0, 1)$

6 votes
3 answers
396 views

How can I prove $\ e^n=\sum_{k=0}^\infty\frac{n^k}{k!}$

3 votes
1 answer
87 views

Rigorous statement on that two small trianges, one being the image of the other by a holomorphic function, are similar

3 votes
0 answers
110 views

Why is `gcd` the answer?

2 votes
1 answer
174 views

How can I find the curves in the problem?

1 vote
0 answers
29 views

Is $\sum_{n=1}^\infty \frac{\cos^2\left(n\right)}{n}$ divergent? [duplicate]

0 votes
1 answer
40 views

Change of variable in univariate polynomials

0 votes
0 answers
97 views

When and how do rational functions goes to infinity

0 votes
5 answers
121 views

Do these 25 gaussian integers make a finite field?

-2 votes
1 answer
82 views

An example that the circle group $\mathrm{S}^1$ embeds in $\mathrm{Sym}(\mathbb{N})$ [closed]

-3 votes
1 answer
55 views

Show the definite integral $\int_{0}^{2\pi}\frac{\cos(t)}{\cos(t) + i \sin(t)}\;dt$ equals $\pi$