User Peter May

9 votes

Why are cup-i products and Steenrod Squares often (always?) unary?

answered Aug 11, 2012 at 14:42

9 votes

Where can I see the proof that the homology groups of the Moore Complex of a simplicial group coincide with the homotopy groups of its geometric realization?

answered Mar 10, 2012 at 2:16

9 votes

Accepted

Can the set of iso classes of G-equivariant H-bundles be given by ordinary homotopy classes of non-equivariant maps?

answered Mar 23, 2012 at 3:07

9 votes

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$\mathcal{I}$-functors and infinite loop spaces

answered Jan 2, 2012 at 0:02

9 votes

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Second homotopy group of the mod 2 Moore spectrum

answered Jun 21, 2012 at 22:35

9 votes

When is the diagonal inclusion a Hurewicz cofibration

answered Sep 3, 2011 at 18:16

9 votes

Are there universe-indexed spectra over simplicial sets?

answered Nov 24, 2011 at 2:45

9 votes

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Are $E_n$-operads not formal in characteristic not equal to zero?

answered Sep 21, 2015 at 23:54

9 votes

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Sign in May’s General algebraic approach to Steenrod operations

answered Jan 19, 2020 at 15:09

9 votes

idea and intuition behind triangulated category

answered Apr 7, 2021 at 0:00

9 votes

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Where does Segal's category come from?

answered Oct 9, 2013 at 2:52

9 votes

Higher commutators in E_n algebras and the Maurer--Cartan equation

answered Nov 9, 2013 at 3:23

9 votes

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Image of J splitting

answered Jan 26, 2014 at 23:16

9 votes

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Classifying space for fibrations with Eilenberg-MacLane space as fibers

answered Oct 6, 2014 at 2:32

9 votes

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$E_{\infty}$ spaces are $A_{\infty}$ spaces

answered Nov 2, 2014 at 21:36

8 votes

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Where is simpleness used in the proof of existence of Postnikov towers of principal fibrations?

answered Apr 29, 2014 at 2:21

8 votes

What does it mean to speak of a homotopy fibration sequence?

answered Apr 5, 2014 at 16:59

8 votes

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Identifying a Hopf algebra cohomology theory

answered May 1, 2015 at 12:58

8 votes

Equivalence of homotopy categories and model structure theory

answered Feb 9, 2014 at 14:30

8 votes

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Pontrjagin ring structure on homology of Eilenberg-Mac Lane spaces

answered Jul 30, 2013 at 1:42

8 votes

A series of articles should be published all in the same journal, or in different journals?

answered Jul 25, 2021 at 2:29

8 votes

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Examples of non-zero negative Steenrod operations

answered Jun 7, 2020 at 3:09

8 votes

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Functoriality of infinite loop space machines?

answered Jul 4, 2019 at 13:52

8 votes

Cobordism Theory of Topological Manifolds

answered Jul 16, 2019 at 3:20

8 votes

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Can a nontrivial spectrum smash to zero with $K$-theory?

answered Jun 10, 2012 at 1:43

8 votes

A homotopyish Landweber exact functor theorem

answered May 23, 2012 at 3:29

8 votes

Is the category of metric spaces and continuous maps Quillen equivalent to Top?

answered Jan 29, 2012 at 15:28

8 votes

Orientation of complex bordism spectrum

answered Jul 17, 2012 at 2:45

8 votes

Is there a categorification of topological K-theory?

answered Aug 5, 2012 at 0:49

8 votes

function space in comma category

answered Dec 4, 2012 at 17:36

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268 Answers

Why are cup-i products and Steenrod Squares often (always?) unary?

Where can I see the proof that the homology groups of the Moore Complex of a simplicial group coincide with the homotopy groups of its geometric realization?

Can the set of iso classes of G-equivariant H-bundles be given by ordinary homotopy classes of non-equivariant maps?

$\mathcal{I}$-functors and infinite loop spaces

Second homotopy group of the mod 2 Moore spectrum

When is the diagonal inclusion a Hurewicz cofibration

Are there universe-indexed spectra over simplicial sets?

Are $E_n$-operads not formal in characteristic not equal to zero?

Sign in May’s General algebraic approach to Steenrod operations

idea and intuition behind triangulated category

Where does Segal's category come from?

Higher commutators in E_n algebras and the Maurer--Cartan equation

Image of J splitting

Classifying space for fibrations with Eilenberg-MacLane space as fibers

$E_{\infty}$ spaces are $A_{\infty}$ spaces

Where is simpleness used in the proof of existence of Postnikov towers of principal fibrations?

What does it mean to speak of a homotopy fibration sequence?

Identifying a Hopf algebra cohomology theory

Equivalence of homotopy categories and model structure theory

Pontrjagin ring structure on homology of Eilenberg-Mac Lane spaces

A series of articles should be published all in the same journal, or in different journals?

Examples of non-zero negative Steenrod operations

Functoriality of infinite loop space machines?

Cobordism Theory of Topological Manifolds

Can a nontrivial spectrum smash to zero with $K$-theory?

A homotopyish Landweber exact functor theorem

Is the category of metric spaces and continuous maps Quillen equivalent to Top?

Orientation of complex bordism spectrum

Is there a categorification of topological K-theory?

function space in comma category