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Jan Bohr
  • Member for 6 years, 4 months
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24 votes
Accepted

Is there a scalar product s.t. the following list is orthogonal?

13 votes

If a topological space is homeomorphic to a smooth manifold, then will it be a smooth manifold?

7 votes

Continuity of coordinate functions

7 votes

Expressing points in fractional dimensions?

6 votes
Accepted

Can a manifold be reconstructed from its charts?

6 votes
Accepted

Integral Domain and $C^*$-algebra

5 votes

Utility of the coordinate free definition of the derivative on manifolds.

5 votes
Accepted

Does $\mathbb{R P}^n \times \mathbb{R P}^n$ admit a metric with positive sectional curvature?

5 votes
Accepted

Explicit contradiction from assumption that $C([0,1], \Bbb R)$ is finite-dimensional

5 votes

Bounded operator are always unbounded?

5 votes
Accepted

Zero-volume sets

5 votes

What does tell me this manifold is a circle?

4 votes
Accepted

Is a circle a function?

4 votes
Accepted

Existence of curve of constant curvature connecting two points

4 votes
Accepted

Properties about topological vector spaces

4 votes

Harmonic functions without critical points (global isothermal coordinates)

4 votes
Accepted

L2-Norm of Gradient?

4 votes

Show this a tempered distribution

4 votes

Is $C^{\infty}\left(M,N\right)$ a Frechet space?

4 votes

Any Examples Of Unbounded Linear Maps Between Normed Spaces Apart From The Differentiation Operator?

4 votes

What are the applications of sequence of functions?

4 votes

Does weak convergance in $L^2(0,T,V)$ imply weak convergance in $V$ a.e. $t$?

4 votes
Accepted

Relation between Riemannian metric and Hermitian structure.

4 votes
Accepted

geodesic of infinite length without self-intersections

4 votes
Accepted

Natural example of a Riemannian manifold with a group structure that is not a Lie group?

4 votes
Accepted

Every Lebesgue measurable set of measure $m$ contains a measurable subset of size $n < m$?

4 votes

Show that a $k$-form $\omega$ is smooth if only if it is smooth as map $\omega : M\rightarrow \Lambda ^k(M)$

4 votes

What is the difference between these mathematical symbols

3 votes
Accepted

The gradient in the boundary of a surface

3 votes

Find $(M,\partial M)$ with injective $H_k(\partial M)\rightarrow H_k(M)$.

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