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happymath
  • Member for 8 years, 4 months
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29 votes
4 answers
20k views

How to find continued fraction of pi

14 votes
2 answers
2k views

Applications of Eckmann–Hilton argument

13 votes
1 answer
436 views

Proving that the number of integer solutions of $x^2-Ny^2=1$ is infinite

12 votes
1 answer
598 views

Can intersection of two manifolds be $xy=0$

12 votes
2 answers
1k views

Importance of the zero free region of Riemann zeta function

7 votes
1 answer
830 views

A combinatorial proof of Wilson's Theorem

7 votes
1 answer
421 views

Proving that the tangent vector of a simple closed curve rotates by $ 2 \pi$

7 votes
2 answers
231 views

On the philosophy of Category Theory

7 votes
0 answers
344 views

Applications of Atiyah Singer Index Theorem

6 votes
2 answers
140 views

Calculating the extraordinary cohomology of $\mathbb{C}P^n$

6 votes
1 answer
2k views

Applications of Whitney's Approximation Theorem

6 votes
1 answer
510 views

Classifying map of tensor product of two line bundles

6 votes
1 answer
138 views

Group of units of $\mathbb{Z}_3[[x]]$

6 votes
2 answers
268 views

A strange answer for $\int _{-1}^1 \log x\; dx$

5 votes
1 answer
501 views

Finding an analytic function such that real part is the given function.

5 votes
2 answers
327 views

An example of space $V$ such that $(V^{\perp})^{\perp} \neq V$

5 votes
1 answer
1k views

value of the integral $\int_0^{2\pi} \log|1-ae^{i \theta}| $

5 votes
7 answers
2k views

Proving that $\sqrt[3] {2} ,\sqrt[3] {4},1$ are linearly independent over rationals

5 votes
1 answer
565 views

Does there exist a nowhere differentiable, everywhere continous, monotone somewhere function?

5 votes
1 answer
236 views

Proving a set to be closed

5 votes
1 answer
149 views

How to integrate $\int_0^{\infty}\frac{e^{-(t+\frac1t)}}{\sqrt t} dt$?

5 votes
1 answer
313 views

If the suspensions of two simply connected spaces are homotopy equivalent, are the spaces homotopy equivalent?

4 votes
1 answer
214 views

Proving that $\xi$ is a trivial vector bundle iff $\xi \oplus \varepsilon^1$ is trivial

4 votes
3 answers
1k views

Proving that hopf map from $S^3 \to S^2 $ is not null homotopic

4 votes
0 answers
342 views

Proving euler class of trivial bundle is zero

4 votes
1 answer
445 views

Reference for Whitney's approximation theorem for manifolds with boundary

4 votes
2 answers
241 views

A question on the non trivial rank three bundle on $S^2$

4 votes
2 answers
92 views

Constructing an Equidistributed set

4 votes
1 answer
221 views

Equivalence between two definitions of compactifications of an elliptic curve

4 votes
1 answer
288 views

Proving $\Gamma(x)$ is holomorphic

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