Yuchen Liu's user avatar
Yuchen Liu's user avatar
Yuchen Liu's user avatar
Yuchen Liu
  • Member for 12 years, 10 months
  • Last seen this week
32 votes
6 answers
4k views

Is there any holomorphic version of the tubular neighborhood theorem?

16 votes
1 answer
633 views

How to calculate the exact differential structure of Brieskorn variety?

13 votes
3 answers
2k views

Is canonical class a topological invariant?

12 votes
3 answers
2k views

Why are $S^3-K$ and $\operatorname{SL}(2,\mathbb R)/{\operatorname{SL}(2, \mathbb Z)}$ diffeomorphic? Here $K$ is a trefoil knot in $S^3$

4 votes
1 answer
657 views

How to deduce this equation for a 4-dim almost Kahler manifold?

3 votes
0 answers
333 views

What is the behaviour of a smooth 3-manifold acting by a circle?

3 votes
2 answers
804 views

How to solve the $C^\alpha$ Poisson equation on closed Riemannian manifolds?

2 votes
1 answer
250 views

Are these two definitions of $\mathcal{O}(1)$ over a ruled surface closely related?

1 vote
1 answer
731 views

The smoothness of fiber and fiber bundle