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Jeff Strom
  • Member for 12 years, 4 months
  • Last seen more than a week ago
37 votes
2 answers
2k views

Finite complexes whose homotopy groups are not "finitely generated"

25 votes
1 answer
2k views

Bouncing a ball down the stairs

19 votes
4 answers
2k views

Difference between represented and singular cohomology?

17 votes
1 answer
1k views

Slick Proof of Kudo Transgression Theorem

15 votes
2 answers
877 views

Pointed Hurewicz model structure

14 votes
5 answers
2k views

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

13 votes
2 answers
3k views

Left and right eigenvalues

12 votes
0 answers
615 views

Mapping cylinders of fibrations

12 votes
1 answer
589 views

Open subspaces of CW complexes

11 votes
2 answers
2k views

Quasifibrations and homotopy pullbacks

11 votes
2 answers
578 views

Spaces that invert weak homotopy equivalences.

10 votes
2 answers
677 views

Model categories of simplicial objects

9 votes
1 answer
254 views

Retracting a wedge of spheres off a homotopy fiber

9 votes
0 answers
254 views

When is an increasing union a colimit?

8 votes
1 answer
193 views

Pointed versus unpointed maps into a topological monoid

8 votes
1 answer
205 views

Splitting low-dimensional $p$-local CW complexes for large $p$

8 votes
3 answers
491 views

Order of the identity map of a Moore space.

8 votes
1 answer
998 views

Are there homotopy equivalences that are not weak homotopy equivalences?

8 votes
2 answers
2k views

Splitting of the Universal Coefficients sequence

7 votes
1 answer
190 views

Injectivity of Rewrite Rule in a Free Lie Algebra

7 votes
1 answer
370 views

Pushouts and products in categories

7 votes
0 answers
82 views

Stable splitting of products

7 votes
1 answer
192 views

Quasifibrations and transfinite filtrations

6 votes
2 answers
172 views

Nonhomeomophic spaces with homeomorphic mapping cones

6 votes
1 answer
1k views

Solid rings and Tor

6 votes
0 answers
272 views

Reference request: splittings in rational homotopy theory

6 votes
0 answers
76 views

Examples of maps with nontrivial Hopf invariant but Lusternik-Schnirelmann category of the cofiber doesn't increase?

6 votes
0 answers
461 views

The Mapping Cylinder of a Pullback Square

6 votes
1 answer
548 views

Origin of "versal"?

6 votes
0 answers
347 views

The Space of Cellular Maps