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Ethan Dlugie
  • Member for 2 years, 6 months
  • Last seen this week
  • UC Berkeley
7 votes
Accepted

Prove that there is no sequence such that it contains subsequences converging to every number in $(0,1)$ and no other number.

5 votes

$n^{th}$ derivative of $\log(x)/x$

4 votes

Homotopy Type of Embeddings of Circles in a 3-manifold

4 votes
Accepted

Dropping closed condition in Transversality Theorem

4 votes
Accepted

Some questions related to the limit $\lim_{x \rightarrow \infty}(\lim_{y \rightarrow \infty} (\frac{x}{y}) )$

4 votes

Klein bottle immersion in 3 space with gaps - why

3 votes
Accepted

Does the parity of the identity of a group hold any known significance?

3 votes
Accepted

Local isometry which is not covering map

3 votes
Accepted

Computing a tricky quotient space

3 votes

Derivative map for connected Lie groups is injective

2 votes

Identity component of $GL_n(\Bbb R)$

2 votes
Accepted

$\{f_n\}$ converges uniformly but $\lim_{n\rightarrow\infty}f_n$ doesn't exist

2 votes

How do I find the Jordan canonical form of this 4x4 matrix?

2 votes

Obtaining the three torus via Dehn surgery

2 votes
Accepted

What is the role of $\gcd(n,|G|) = 1$ in the following question?

2 votes
Accepted

Compactness of covering space implies compactness of base space ...

2 votes
Accepted

Mapping class group of $S^1 \times S^1 \times I$

2 votes

Can ${\rm inf} (A\cap B) > {\rm max} ({\rm inf} A, {\rm inf} B )$?

1 vote
Accepted

An undirected graph is partitioned. For every partition $V_1 \cup V_2 = V$, $v_1 \in V_1$ is connected to some $v_2 \in V_2$. Show it is connected.

1 vote

Thickening a tree always gives a disc

1 vote
Accepted

Different Representations of Dunce Cap

1 vote

Find the volume formula of a simplex proving that $\int_0^1\int_0^{1-x_n}...\int_0^{1-(x_n+...+x_2)}1\,\,\,dx_1...dx_n=\frac 1{n!}$

1 vote
Accepted

quasi-circle has trivial homology group

1 vote

Question about orientations and loops of the $n-1$ faces of an n-simplex $\Delta^n$

1 vote
Accepted

Formalizing "the symmetry group of a non-square rectangle"

1 vote

No closed orientable 3-manifold is homotopy equivalent to $S_g\vee S^3$

1 vote
Accepted

Does uniformization theorem imply all 2d manifolds are confromally flat?

1 vote
Accepted

Is this the correct homotopy rel $\{0,1\}$?

1 vote

Continuous and dense embedding preserves orthogonality?

1 vote
Accepted

Geometric Similarity of Functions