1. Home
2. Questions
3. Tags
5. Users
6. Unanswered
Teams

Now available on Stack Overflow for Teams! AI features where you work: search, IDE, and chat.
Learn more Explore Teams
Teams
Ask questions, find answers and collaborate at work with Stack Overflow for Teams. Explore Teams

pyridoxal_trigeminus

Member for 3 years, 4 months
Last seen this week

Summary

Reputation

2,464

2.5k
2.3k
2.1k

Dec
Mar
Jun
Sep

Top tag

general-topology

Next privilege

2,500 Rep.

Create tag synonyms

Badges

7

20

Newest

Caucus

Next badge

0/1

Excavator

Impact

~32k

people reached

94

helpful flags

184

votes cast

Questions

View all 149 questions

10

How to rationalize the denominator $\frac{1}{1 + \sqrt[3]{5} - \sqrt[3]{25}}$

May 10, 2023

8

Prove that $\mathbb{Z} \times\Bbb Z_2$ and $\mathbb{Z}$ are not isomorphic.

Jan 31, 2022

6

Is there a such thing as a free group generated by a free group?

Mar 19, 2022

6

How to find all positive integers $n,k$ such that ${n\choose k}=m$ for a given $m$?

Mar 19

5

Why is $2$ the doubling constant of $\mathbb R$?

Feb 16, 2023

Answers

View all 6 answers

3

If $X$ is a topological space homeomorphic to $D^n$ then every continuous $f:X\to X$ has a fixed point.

May 2, 2023

1

Does there exist a class of graphs with $O(n^2)$ maximal cliques which can be realized as the 1-skeleton of a Vietoris-Rips complex in $\mathbb R^2$?

Jan 22, 2023

0

How is the Cech complex a subcomplex of the Vietoris Rips complex?

Jun 8

0

Is this function surjective or injective?

Oct 30, 2021

0

Any injective homomorphism $F_n\to F_n$ with image of finite index is bijective ($n\geq 2$)

Mar 8, 2022

Tags

View all 137 tags

general-topology

3

Score

40

posts

algebraic-topology

3

Score

33

posts

graph-theory

1

Score

22

posts

simplicial-complex

1

Score

9

posts

solution-verification

0

Score

49

posts

Reputation

+10

If $X$ is a topological space homeomorphic to $D^n$ then every continuous $f:X\to X$ has a fixed point.

+10

Proof of existence of $\epsilon$-nets in infinite metric spaces.

+10

How to rationalize the denominator $\frac{1}{1 + \sqrt[3]{5} - \sqrt[3]{25}}$

+10

Spaces with free $\pi_1$ but not homotopy equivalent to a wedge sum of spheres?

Badges

View all badges

This user doesn’t have any gold badges yet.

7

silver badges

Deputy

Mar 10
Inquisitive

Nov 6, 2022
Enthusiast

Feb 25, 2023

20

bronze badges

Self-Learner

May 2, 2023
Promoter

Mar 25, 2023
Citizen Patrol

Oct 30, 2021

Accounts

View all 32 accounts

2,464
7
20

703
4
9

Electrical Engineering

357
1
7

295
1
9

Mathematics Educators

271
1
3

Active bounties (0)

This user has no active bounties

Votes cast

115

upvotes

69

downvotes

60

question votes

124

answer votes