User HenrikRüping

8 votes

0 answers

137 views

When is an ideal in the cohomology ring the kernel of a map induced by a map of spaces?

asked May 19, 2022 at 9:14

7 votes

1 answer

539 views

What is the topology on the set of field orders

asked Oct 30, 2019 at 8:08

7 votes

2 answers

425 views

Ideals invariant under ring automorphisms

asked Dec 15, 2018 at 15:16

7 votes

1 answer

366 views

Is every finitely generated group colimit of residually finite groups

asked Oct 25, 2010 at 14:18

7 votes

1 answer

720 views

Is there an amenabilization of groups ?

asked Oct 4, 2010 at 14:31

7 votes

1 answer

362 views

For which rings does a projectivization of modules exist?

asked May 20, 2010 at 11:49

7 votes

0 answers

512 views

Is there a natural topology on the set of open sets ?

asked Apr 2, 2012 at 7:45

7 votes

3 answers

1k views

Group rings of infinite products of groups

asked Nov 22, 2010 at 13:56

7 votes

3 answers

448 views

Question concerning h-cobordisms

asked Jun 7, 2011 at 15:48

6 votes

1 answer

314 views

Does the poset of free factors of a free group form a lattice?

asked Mar 25, 2013 at 14:06

6 votes

2 answers

524 views

Do geodesics in SL2R map to geodesics in the hyperbolic plane?

asked Dec 21, 2014 at 8:15

6 votes

1 answer

167 views

Orbits of exterior products

asked Feb 27, 2012 at 12:20

6 votes

0 answers

175 views

Spaces with the thin tetrahedra property

asked Jun 15, 2010 at 12:04

6 votes

3 answers

371 views

Notion of finite dimensional simplicial space

asked Feb 12, 2010 at 12:32

6 votes

1 answer

319 views

Stability of midpoints in CAT(0) spaces

asked Aug 30, 2010 at 8:51

6 votes

2 answers

409 views

length of decompositions into elementary matrices

asked Nov 17, 2010 at 15:00

6 votes

0 answers

388 views

Higher cohomology operations and spectral sequences

asked Jan 17, 2018 at 12:20

5 votes

1 answer

286 views

Massey Products on a specific space

asked Aug 9, 2016 at 17:57

5 votes

1 answer

309 views

Can the free module in the representation ring be characterised this way?

asked Oct 11, 2023 at 6:27

5 votes

2 answers

1k views

Structure theorem of f.g. modules over a (non) PID

asked Nov 16, 2010 at 13:37

5 votes

1 answer

342 views

What is known about the ultra-inverse limit?

asked Oct 21, 2010 at 12:23

5 votes

1 answer

300 views

Lebesgue dimension of closures satisfying the Z-set condition

asked Sep 7, 2010 at 14:08

5 votes

2 answers

266 views

Symmetric colorings of regular tessellations

asked Jun 22, 2010 at 21:31

5 votes

2 answers

2k views

Iterated calculation of determinants

asked Dec 10, 2010 at 15:41

5 votes

3 answers

858 views

Additive functions on a lattice

asked Feb 15, 2011 at 14:01

4 votes

1 answer

241 views

cardinality of local bases in the non-standard reals

asked Jan 19, 2011 at 16:59

4 votes

1 answer

282 views

When is Out$(SL_n(R))$ a torsion group ?

asked Mar 28, 2011 at 12:17

4 votes

1 answer

161 views

Hyperbolizing geodesic spaces

asked Feb 1, 2012 at 13:38

4 votes

1 answer

310 views

Ideals in exterior algebras over the field with two elements

asked Mar 2, 2016 at 2:06

4 votes

0 answers

198 views

Are these groups isomorphic (Cancellation in torsionfree, virtually Abelian groups)

asked Jan 30, 2013 at 13:17

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85 Questions

When is an ideal in the cohomology ring the kernel of a map induced by a map of spaces?

What is the topology on the set of field orders

Ideals invariant under ring automorphisms

Is every finitely generated group colimit of residually finite groups

Is there an amenabilization of groups ?

For which rings does a projectivization of modules exist?

Is there a natural topology on the set of open sets ?

Group rings of infinite products of groups

Question concerning h-cobordisms

Does the poset of free factors of a free group form a lattice?

Do geodesics in SL2R map to geodesics in the hyperbolic plane?

Orbits of exterior products

Spaces with the thin tetrahedra property

Notion of finite dimensional simplicial space

Stability of midpoints in CAT(0) spaces

length of decompositions into elementary matrices

Higher cohomology operations and spectral sequences

Massey Products on a specific space

Can the free module in the representation ring be characterised this way?

Structure theorem of f.g. modules over a (non) PID

What is known about the ultra-inverse limit?

Lebesgue dimension of closures satisfying the Z-set condition

Symmetric colorings of regular tessellations

Iterated calculation of determinants

Additive functions on a lattice

cardinality of local bases in the non-standard reals

When is Out$(SL_n(R))$ a torsion group ?

Hyperbolizing geodesic spaces

Ideals in exterior algebras over the field with two elements

Are these groups isomorphic (Cancellation in torsionfree, virtually Abelian groups)