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gaoxinge
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12 votes
1 answer
2k views

Heat Equation on Manifold

12 votes
3 answers
4k views

Difference between Homology and Cohomology

12 votes
2 answers
1k views

Pseudo-Riemannian Metric on Manifold

9 votes
1 answer
2k views

Equidistribution of $an^\sigma$ for $\sigma\in(0,1)$

9 votes
1 answer
615 views

The Curve in $R^n$

8 votes
1 answer
3k views

How to Generalize Pick Theorem

6 votes
1 answer
1k views

The Definition of the Second Fundamental Form

6 votes
2 answers
2k views

Actions of Finite Groups on Trees

6 votes
1 answer
625 views

Riemannian Metric of Lobatchchevski Geometry

6 votes
0 answers
2k views

Is There a de Rham Homology

6 votes
1 answer
1k views

What is a regular homotopy?

6 votes
1 answer
2k views

Geodesic of Stiefel manifold

5 votes
2 answers
2k views

Classify Open Sets in $\mathbb R^2$

5 votes
1 answer
333 views

Optimization on Stiefel Manifold

5 votes
1 answer
1k views

difference between sequence in topological space and metric space

5 votes
3 answers
155 views

Value of $\sum\sin\frac{1}{2^i}$

5 votes
1 answer
139 views

Definition of No Tear and No Paste

5 votes
1 answer
1k views

Estimate the Number of Conjugacy Classes of $G$

5 votes
2 answers
1k views

The limit of $\sin(n^\alpha)$

5 votes
4 answers
2k views

The fundamental group of Cayley graph

4 votes
1 answer
2k views

In the ring $A[x]$ the Jacobson radical is equal to the nilradical.

4 votes
1 answer
4k views

The Definition of Convex Surface

4 votes
2 answers
827 views

Representation of $S_4$

4 votes
2 answers
289 views

A Problem about Common Eigenvector

4 votes
1 answer
86 views

Topological Structure of Finite Set

4 votes
1 answer
2k views

Gradient of Harmonic Function

3 votes
1 answer
1k views

What is Model Spaces

3 votes
1 answer
211 views

Prove that $\forall\alpha\geq\omega$, $|L_\alpha|=|\alpha|$ without AC

3 votes
1 answer
530 views

Differential Structure of Two Dimensional Manifold

3 votes
1 answer
570 views

Cut Möbius Band