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Tim kinsella
  • Member for 10 years, 11 months
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13 votes
Accepted

Best book on axiomatic set theory.

12 votes
Accepted

Are quotient groups unique up to isomorphism

8 votes

The Lebesgue measure of the boundary of a simply connected domain

6 votes

Is hedgehog of countable spininess separable space?

6 votes
Accepted

$fg\in L^1$ for all $g\in L^q$ $\Longrightarrow f\in L^p$

6 votes

Book on "Measure and integration" for starters.

6 votes
Accepted

Is volume form equal to the top-dimensional form with coefficient $1$?

6 votes
Accepted

Example of commuting vector fields generating globally noncommuting flows

6 votes
Accepted

Star-shaped domain whose closure is not homeomorphic to $B^n$

5 votes

Continuous bijections between $\mathbb{R}^2$ and $\mathbb{R}^2 \setminus \{(0,0)\}$

5 votes
Accepted

Cup product on torus

5 votes
Accepted

Do two elements in the same homology class have the same homology?

5 votes

Does there exist a function such that $\lim_{x \to a} f(x) = L$ for all $a \in \mathbb R$ but $f(x)$ is never $L$?

5 votes
Accepted

Is it true that if a Lie group act trivially on an open subset of a manifold the action of the group is trivial (on the whole manifold)?

4 votes
Accepted

Center of Lie group and Lie algebra

4 votes
Accepted

Am I correct in saying that there are no non-commuting connected one-parameter Lie groups?

4 votes
Accepted

Relation between Aut(G) and Aut(g)

3 votes
Accepted

Free and proper action

3 votes

Inducing a surface area measure on $S^2$ from the Haar measure on $SO(3)$

3 votes

Normal subgroup and Lie algebra

3 votes

Submanifold given by an immersion open onto its image

3 votes

Let $M$ be a smooth simply-connected compact manifold of dimension $n$. Is there an immersion of $M$ into the $n$-torus $T^n = S^1 × . . . × S^1?$

3 votes
Accepted

It Suffices to Check Mixing on an Algebra

3 votes

Measure zero sets

3 votes

Representation of the lie algebra of a simply connected algebraic group $G$ induces a representation of the group itself

3 votes

Is the function differentiable at $0$?

3 votes

Proving whether the series $\sum_{n=1}^\infty \frac{(-1)^n}{n-(-1)^n}$ converges.

3 votes
Accepted

Exercise 36 Ch 1 in Stein's Real Analysis

3 votes

Left regular action of $L^1(G)$ on $L^2(G)$ is given by convolution.

3 votes

Closed subscheme from Ideals on affine open subsets