User FKranhold

9 votes

1 answer

595 views

Cup products in the Mayer-Vietoris sequence

asked May 3, 2018 at 16:03

6 votes

1 answer

188 views

Two monoidal structures and copowering

ct.category-theory monoidal-categories operads enriched-category-theory

asked Mar 27, 2019 at 20:47

6 votes

1 answer

258 views

Isomorphisms in enriched categories

ct.category-theory enriched-category-theory

asked Mar 28, 2019 at 12:11

6 votes

1 answer

313 views

Free operad over a monoid object

ct.category-theory monoidal-categories operads

asked Apr 12, 2019 at 12:19

6 votes

1 answer

217 views

Equivalence relations in arbitrary categories

ct.category-theory universal-algebra limits-and-colimits

asked Aug 8, 2019 at 16:58

6 votes

0 answers

139 views

Continuous functors, spectra and homology theories

at.algebraic-topology homotopy-theory stable-homotopy

asked Oct 5, 2019 at 12:28

6 votes

1 answer

120 views

Is there a filtered splitting of product labelling spaces?

at.algebraic-topology homotopy-theory operads loop-spaces configuration-spaces

asked Feb 11, 2021 at 15:14

5 votes

1 answer

212 views

Enriched coends which preserve equivalences

at.algebraic-topology ct.category-theory homotopy-theory model-categories operads

asked Apr 22, 2021 at 15:45

5 votes

1 answer

470 views

Sign in May’s General algebraic approach to Steenrod operations

at.algebraic-topology homological-algebra differential-graded-algebras chain-complexes

asked Jan 6, 2020 at 16:53

5 votes

1 answer

261 views

Ádem relations for the Steenrod and the Dyer–Lashof algebra

at.algebraic-topology cohomology steenrod-algebra cohomology-operations

asked Apr 25, 2019 at 13:27

5 votes

1 answer

202 views

Graded commutativity of the $n$th Browder bracket

at.algebraic-topology operads configuration-spaces equivariant differential-graded-lie-algebras

asked Apr 4, 2019 at 14:46

4 votes

0 answers

169 views

Dyer–Lashof operations for more than 2 inputs

at.algebraic-topology homological-algebra operads chain-complexes covering-spaces

asked Apr 7, 2019 at 16:43

4 votes

1 answer

469 views

Generators of the mapping class group for surfaces with punctures and boundaries

moduli-spaces mapping-class-groups surfaces

asked Mar 25, 2019 at 12:26

4 votes

0 answers

113 views

Second homology of finitely presented group with free abelianisation

at.algebraic-topology gr.group-theory homological-algebra group-cohomology

asked Feb 5, 2019 at 23:15

4 votes

1 answer

152 views

Conjugating generators in free groups

gr.group-theory free-groups

asked May 1, 2019 at 16:17

4 votes

0 answers

107 views

Mysterious identity in cosimplicial $R$-module with Lie brackets

at.algebraic-topology ra.rings-and-algebras lie-algebras simplicial-stuff

asked Jul 1, 2019 at 14:52

4 votes

0 answers

98 views

Pushforward of an internal category along a functor

ct.category-theory homotopy-theory enriched-category-theory internal-categories

asked Jul 19, 2019 at 18:26

4 votes

1 answer

304 views

Different ways to “deloop” a (topological) $A_\infty$-algebra

at.algebraic-topology homotopy-theory operads monads a-infinity-algebras

asked Sep 10, 2020 at 22:27

4 votes

0 answers

229 views

Composition of prolongations of $\Gamma$-spaces

at.algebraic-topology ct.category-theory homotopy-theory kan-extension

asked Oct 13, 2019 at 18:05

4 votes

1 answer

187 views

Group completion of $E_k$-algebras

at.algebraic-topology homotopy-theory operads mapping-class-groups classifying-spaces

asked Aug 17, 2019 at 12:26

4 votes

0 answers

150 views

Relative Thom isomorphism

at.algebraic-topology cohomology vector-bundles group-actions principal-bundles

asked Feb 3, 2021 at 20:43

3 votes

0 answers

66 views

Simplicial spaces and reflexive coequalisers

homotopy-theory simplicial-stuff model-categories cofibrations

asked Dec 2, 2021 at 18:45

3 votes

1 answer

143 views

Are cofibrations in topological monoids preserved by forming the product with the identity?

at.algebraic-topology model-categories semigroups-and-monoids monoidal-categories cofibrations

asked Nov 22, 2020 at 21:29

3 votes

0 answers

117 views

Classifying spaces of amalgamated topological monoids

at.algebraic-topology homotopy-theory semigroups-and-monoids limits-and-colimits classifying-spaces

asked Sep 2, 2020 at 18:28

3 votes

0 answers

137 views

Naturality of Poincaré–Lefschetz

at.algebraic-topology manifolds homology duality

asked Jun 17, 2019 at 19:22

3 votes

0 answers

73 views

Generating an enriched multicategory

ct.category-theory monoidal-categories operads enriched-category-theory

asked Apr 17, 2019 at 0:16

3 votes

0 answers

123 views

Dual Steenrod squares

at.algebraic-topology cohomology duality products steenrod-algebra

asked Apr 22, 2019 at 18:04

3 votes

0 answers

85 views

Homotopy type of hyperplane arrangements intersected with real subspaces

at.algebraic-topology homotopy-theory hyperplane-arrangements

asked Feb 1, 2019 at 14:39

3 votes

1 answer

87 views

$H$-space structure on coloured algebras

homotopy-theory operads abstract-nonsense

asked Feb 20, 2019 at 19:35

3 votes

1 answer

277 views

Covering with Deck group $\mathfrak{S}_3$

at.algebraic-topology symmetric-groups cw-complexes covering-spaces

asked Apr 3, 2019 at 19:38

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41 Questions

Cup products in the Mayer-Vietoris sequence

Two monoidal structures and copowering

Isomorphisms in enriched categories

Free operad over a monoid object

Equivalence relations in arbitrary categories

Continuous functors, spectra and homology theories

Is there a filtered splitting of product labelling spaces?

Enriched coends which preserve equivalences

Sign in May’s General algebraic approach to Steenrod operations

Ádem relations for the Steenrod and the Dyer–Lashof algebra

Graded commutativity of the $n$th Browder bracket

Dyer–Lashof operations for more than 2 inputs

Generators of the mapping class group for surfaces with punctures and boundaries

Second homology of finitely presented group with free abelianisation

Conjugating generators in free groups

Mysterious identity in cosimplicial $R$-module with Lie brackets

Pushforward of an internal category along a functor

Different ways to “deloop” a (topological) $A_\infty$-algebra

Composition of prolongations of $\Gamma$-spaces

Group completion of $E_k$-algebras

Relative Thom isomorphism

Simplicial spaces and reflexive coequalisers

Are cofibrations in topological monoids preserved by forming the product with the identity?

Classifying spaces of amalgamated topological monoids

Naturality of Poincaré–Lefschetz

Generating an enriched multicategory

Dual Steenrod squares

Homotopy type of hyperplane arrangements intersected with real subspaces

$H$-space structure on coloured algebras

Covering with Deck group $\mathfrak{S}_3$