User Jeff Strom

13 votes

2 answers

3k views

Left and right eigenvalues

asked Jul 17, 2010 at 17:13

6 votes

3 answers

3k views

The fiber of a Serre fibration

asked Jan 29, 2011 at 17:41

4 votes

1 answer

3k views

Notation for algebras

asked Jun 19, 2010 at 16:04

25 votes

1 answer

2k views

Bouncing a ball down the stairs

asked Jun 19, 2014 at 0:59

38 votes

2 answers

2k views

Finite complexes whose homotopy groups are not "finitely generated"

asked May 29, 2014 at 1:32

19 votes

4 answers

2k views

Difference between represented and singular cohomology?

asked Jun 24, 2010 at 20:28

13 votes

2 answers

2k views

Quasifibrations and homotopy pullbacks

asked Jan 30, 2011 at 14:23

8 votes

2 answers

2k views

Splitting of the Universal Coefficients sequence

asked Jun 13, 2010 at 1:26

14 votes

5 answers

2k views

Good reference for homology of $K(\mathbb{Z}, 2n)$?

asked Jun 7, 2010 at 16:56

4 votes

1 answer

2k views

Tensor product of spectral sequences?

asked Jun 10, 2010 at 17:52

19 votes

1 answer

2k views

Slick Proof of Kudo Transgression Theorem

asked Mar 11, 2011 at 1:27

1 vote

3 answers

1k views

Reference for intersection and linking in algebraic topology

asked Jul 29, 2010 at 19:59

6 votes

1 answer

1k views

Solid rings and Tor

asked Apr 25, 2012 at 13:57

8 votes

1 answer

1k views

Are there homotopy equivalences that are not weak homotopy equivalences?

asked Jul 15, 2010 at 19:22

15 votes

2 answers

957 views

Pointed Hurewicz model structure

asked Nov 30, 2010 at 4:29

5 votes

2 answers

860 views

Characterizing the rationalization of spaces.

asked Jul 8, 2010 at 16:48

5 votes

1 answer

761 views

Groups with no perfect subgroups -- terminology?

asked Oct 12, 2010 at 1:57

10 votes

2 answers

710 views

Model categories of simplicial objects

asked Jan 12, 2011 at 18:46

12 votes

1 answer

702 views

Open subspaces of CW complexes

asked Aug 26, 2019 at 15:11

12 votes

0 answers

651 views

Mapping cylinders of fibrations

asked Dec 15, 2010 at 14:46

12 votes

2 answers

626 views

Spaces that invert weak homotopy equivalences.

asked Nov 23, 2010 at 2:15

6 votes

1 answer

570 views

Origin of "versal"?

asked Nov 24, 2010 at 15:54

8 votes

3 answers

519 views

Order of the identity map of a Moore space.

asked Nov 19, 2010 at 3:01

8 votes

1 answer

519 views

Pushouts and products in categories

asked Sep 11, 2020 at 14:35

6 votes

0 answers

494 views

The Mapping Cylinder of a Pullback Square

asked Sep 22, 2010 at 14:48

0 votes

1 answer

463 views

Terminology for posets.

asked Dec 18, 2010 at 13:25

4 votes

1 answer

434 views

Contractible space of maps between Eilenberg-Mac Lane spaces

asked Jan 24, 2011 at 19:16

5 votes

0 answers

422 views

Reference for homotopy orbits of pointed spaces

asked Jan 7, 2011 at 18:59

6 votes

0 answers

358 views

The Space of Cellular Maps

asked Nov 10, 2010 at 18:44

9 votes

0 answers

356 views

When is an increasing union a colimit?

asked Jul 29, 2020 at 15:53

Stack Exchange Network

66 Questions

Left and right eigenvalues

The fiber of a Serre fibration

Notation for algebras

Bouncing a ball down the stairs

Finite complexes whose homotopy groups are not "finitely generated"

Difference between represented and singular cohomology?

Quasifibrations and homotopy pullbacks

Splitting of the Universal Coefficients sequence

Good reference for homology of $K(\mathbb{Z}, 2n)$?

Tensor product of spectral sequences?

Slick Proof of Kudo Transgression Theorem

Reference for intersection and linking in algebraic topology

Solid rings and Tor

Are there homotopy equivalences that are not weak homotopy equivalences?

Pointed Hurewicz model structure

Characterizing the rationalization of spaces.

Groups with no perfect subgroups -- terminology?

Model categories of simplicial objects

Open subspaces of CW complexes

Mapping cylinders of fibrations

Spaces that invert weak homotopy equivalences.

Origin of "versal"?

Order of the identity map of a Moore space.

Pushouts and products in categories

The Mapping Cylinder of a Pullback Square

Terminology for posets.

Contractible space of maps between Eilenberg-Mac Lane spaces

Reference for homotopy orbits of pointed spaces

The Space of Cellular Maps

When is an increasing union a colimit?