network profile
| bio | website | |
|---|---|---|
| location | Hangzhou, China | |
| age | 21 | |
| visits | member for | 6 months |
| seen | 5 hours ago | |
| stats | profile views | 127 |
I'm just a guy learning and enjoying in math. My name in MO is yizhongxunhuan. Which in Chinese means a recycle.
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6h |
asked | The covering space of a region contained in complex plane delete two points. |
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May 9 |
comment |
Closed form for $\sum_{n=-\infty}^{\infty}\frac{1}{(n-a)^2+b^2}$. I think Poisson's summation formula might help. |
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Apr 29 |
comment |
Need help with finding length of sides and angles of a triangle in upper half plane model All the conformal(holomorphic) bijection of upper half plane to itself doesn't change the length,i.e., they're isometry. So you could after an isometry to take the circle passing through i and 1+2i with center at real axis to a vertical line. |
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Apr 11 |
asked | Finding two subsets whose intersection has measure $\gt A-\varepsilon$ |
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Apr 9 |
comment |
Prove Poincare duality theorem with Morse theory. I think it's really cool. Looking forward for your answer. |
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Apr 8 |
comment |
Approach topological manifolds with smooth manifolds Wow, this is really interesting. So there is actually a huge difference between smooth and topological manifolds? I thought they are almost the same before. |
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Apr 8 |
accepted | Approach topological manifolds with smooth manifolds |
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Apr 7 |
asked | Approach topological manifolds with smooth manifolds |
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Apr 7 |
asked | Prove Poincare duality theorem with Morse theory. |
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Mar 30 |
comment |
Final year project ideas - complex analysis @Willie Wong♦ Thank you, sometimes I omit the second name because I think it won't cause any confusion. |
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Mar 25 |
accepted | A result similar to Schwarz lemma |
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Mar 24 |
asked | A result similar to Schwarz lemma |
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Mar 22 |
accepted | Prove the limit at infinity is 0 |
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Mar 21 |
asked | Prove the limit at infinity is 0 |
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Mar 19 |
comment |
Final year project ideas - complex analysis I suggest you to take a look at the book of E.M.Stein. |
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Mar 19 |
answered | Final year project ideas - complex analysis |
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Mar 6 |
comment |
How much of an $n$-dimensional manifold can we embed into $\mathbb{R}^n$? What is cut locus? |
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Mar 6 |
asked | How much of an $n$-dimensional manifold can we embed into $\mathbb{R}^n$? |
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Mar 6 |
comment |
Show that the sequence $\sqrt{2},\sqrt{2\sqrt{2}},\sqrt{2\sqrt{2\sqrt{2}}},…$ converges and find its limit. Well, they are less than 2, because of the recursive formula and the set up data is less than 2. I think now it's correct. Thanks again for pointing out my mistakes. I always make silly mistakes like this. |
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Mar 6 |
revised |
Show that the sequence $\sqrt{2},\sqrt{2\sqrt{2}},\sqrt{2\sqrt{2\sqrt{2}}},…$ converges and find its limit. added 1 characters in body |
