Stefan Friedl

Member for 13 years, 2 months
Last seen this week

University of Cologne

Summary

Reputation

2,547

2.5k
2k
1.5k

2020
2021
2022
2023

Top tag

gt.geometric-topology

Next privilege

3,000 Rep.

Cast close & reopen votes

Badges

12

22

Newest

Popular Question

Next badge

0/1

Excavator

Questions

View all 15 questions

Score Activity Newest Views

20

Topological embeddings of real projective space in euclidean space

Jan 28, 2018

19

Are the Morse inequalities sharp for 5-manifolds

Oct 13, 2020

19

are there high-dimensional knots with non-trivial normal bundle?

Jan 24, 2021

13

applications of Sard's to differential topology

Aug 26, 2021

13

Finite index subgroups of free groups and torsion-free amenable quotients of free groups

Nov 10, 2011

Answers

View all 8 answers

Score Activity Newest

24

Elevator pitch for the Virtual Fibering Theorem

Jun 15, 2012

10

Invariants of high-dimensional knots

Oct 2, 2013

10

The Alexander polynomial of a slice knot, Reidemeister tosion, Whitehead group

May 5, 2014

9

Relation between the Alexander module of a link and intermediate free abelian covers

May 5, 2014

8

Judging whether a finitely presented group is a 3-manifold group?

Oct 25, 2012

Tags

View all 17 tags

gt.geometric-topology

62

Score

17

posts

knot-theory

33

Score

4

posts

3-manifolds

28

Score

4

posts

at.algebraic-topology

27

Score

5

posts

big-picture

24

Score

1

post

Reputation

This user has no recent positive reputation changes.

Badges

View all badges

This user doesn’t have any gold badges yet.

12

silver badges

Yearling

× 12

Jan 4, 2022

22

bronze badges

Curious

Jul 2, 2014
Commentator

Mar 1, 2014
Teacher

Jun 15, 2012

Accounts

2,547
12
22

131
2

111
1

Meta Stack Exchange

101

Active bounties (0)

Active Offered Earned

This user has no active bounties

Votes cast

24

upvotes

13

question votes

11

answer votes