John Klein

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Name John Klein
Member for 2 years
Seen 52 mins ago
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Location The land they call the midwest
Age 50
I'm an algebraic topologist. I also like espresso.
20

Questions
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On the (derived) dual to the James construction.

apr 19 12 at 0:49 John Klein 7,206●19●28

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Geometric interpretation of the Pontryagin square

mar 25 11 at 20:15 Kevin Walker 6,157●1●10●32

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Hilton-Eckmann dual of the Steenrod Algebra

may 16 12 at 14:26 John Klein 7,206●19●28

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“Skew Cohomology” of a Space

mar 4 11 at 21:34 Mariano Suárez-Alvarez 30.6k●7●68●153

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co-$A_\infty$ spaces

jan 29 11 at 2:22 MathOverflow♦ 1●2●3

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Question about $A_\infty$ maps

jan 12 11 at 3:27 John Klein 7,206●19●28

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On the naturality of the bar construction

mar 20 at 0:58 Peter May 12.1k●1●38●54

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89

Answers
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26
Can anyone explain to me what is an assembly map?
15
Choice of base point in a Waldhausen category
14
Groupoid actions on spaces
13
What does actually being a CW-complex provide in algebraic topology?
13
Finite-dimensionality for de Rham cohomology
13
What is the intuition behind the Freudenthal suspension theorem
13
Characteristic classes for block bundles
11
Reverse map of a homology equivalence.
10
Lambda-operations on stable homotopy groups of spheres
10
A map inducing isomorphisms on homology but not on homotopy
10
The classifying space of a gauge group
10
topological type of smooth manifolds with prescribed homotopy type and pontryagin class
10
Dualizable classifying spaces
10
Definition of Pontrjagin Classes
9
Homotopy Units in $A_\infty$-spaces
9
Natural transformations as categorical homotopies
9
Parallelizability of the Milnor’s exotic spheres in dimension 7
9
“C choose k” where C is topological space
9
How to prove the connected sum of two closed aspherical n-manfolds (n >2) is not asperical?
9
Motivation/interpretation for Quillen’s Q-construction?
9
The space of framed functions
8
Is an A-infinity thing the same the same as strict thing viewed through a homotpy equivalence?
8
The fundamental group of space which has both an H and a co-H structure
8
Analogue to Serre spectral sequence for cofiber sequences and homotopy
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Homotopic maps out of cofibration sequences
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Homotopy Groups of Connected Sums
7
Is there a long exact sequence associated to a ramified covering?
7
Homotopy dimension of a mapping
7
Degeneracies for semi-simplicial Kan complexes
7
Can we decompose Diff(MxN)?
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