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John Klein
  • Member for 12 years
  • Last seen this week
  • Metro Detroit. Brooklyn expatriate.
41 votes
0 answers
2k views

Thomason's "open letter" to the mathematical community

27 votes
0 answers
1k views

On the (derived) dual to the James construction.

18 votes
2 answers
2k views

Geometric interpretation of the Pontryagin square

18 votes
1 answer
550 views

Local homology of a space of unitary matrices

17 votes
3 answers
2k views

Transversality in the proof of the Blakers-Massey Theorem. Is it necessary?

16 votes
1 answer
534 views

Whitehead products and Framed Manifolds

16 votes
1 answer
2k views

On the wikipedia entry for Borel-Moore homology

16 votes
4 answers
1k views

Multiplicativity of the Euler characteristic for fibrations

15 votes
2 answers
1k views

"Strøm-type" model structure on chain complexes?

12 votes
0 answers
393 views

Hilton-Eckmann dual of the Steenrod Algebra

12 votes
1 answer
818 views

Equivariant homotopy theory: some history questions

12 votes
1 answer
870 views

On the stable splitting of loops on a suspension

12 votes
1 answer
206 views

A variant of $\ell^2$-cochains

12 votes
1 answer
321 views

Rational homotopy invariance of algebraic $K$-theory

12 votes
2 answers
466 views

"Burnside ring" of the natural numbers and algebraic K-theory

11 votes
2 answers
656 views

Reference request: Goodwillie tower of the identity

10 votes
0 answers
502 views

When is the one-point compactification well-pointed?

10 votes
1 answer
556 views

Acyclic aspherical spaces with acyclic fundamental groups

10 votes
3 answers
582 views

On the naturality of the bar construction

10 votes
1 answer
576 views

co-$A_\infty$ spaces

10 votes
0 answers
352 views

Question about $A_\infty$ maps

9 votes
2 answers
645 views

"Skew Cohomology" of a Space

9 votes
0 answers
332 views

History of the definition of smooth manifold with boundary

8 votes
1 answer
506 views

Weak Vector Bundles

8 votes
1 answer
952 views

The free smooth path space on a manifold

8 votes
1 answer
675 views

On the Euler characteristic of a Poincaré duality space

8 votes
1 answer
268 views

Finite domination and compact ENRs

7 votes
0 answers
125 views

Weak homotopy type of the Cech Nerve

7 votes
2 answers
991 views

Deformation theory of co-$A_\infty$ structures.

7 votes
2 answers
539 views

Why does the map $BG\to A(*)$ fail to split?