93

Answers

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3

Singular Homology/Cohomology as a derived functor?

3

Nerves of simplicial objects in categories/Waldhausen’s S-construction

3

Concrete example of $\infty$-categories.

3

References for the categories: DIFF PL LIP TOP

3

Topological examples of profinite groups

2

Duality between proper homotopy theory and strong shape theory

2

Does the extension to the pro-completion of a left exact (finite) colimit preserving functor preserve (finite) colimits

2

Groupoid actions on spaces

2

How to define tuples?

2

Computation of Joins of Simplicial Sets

2

Explicit classifying spaces for crossed complexes

2

How strict can I be in the definition of “2-group”?

2

What (if anything) happened to Viennot’s theory of Heaps of pieces?

2

Nerve: Groupoids-> Kan Complexes. Nerve: Bicategories w. adjoints -> ?

2

How do you decide whether a question in abstract algebra is worth studying?

2

Computing the image of the unit map of the join/overcategory adjunction for simplicial sets

1

Presentation of extentions of groups

1

How does the discrete group act on simplicial set level by level

1

using some, given category D to talk about all other categories (Topoi?)

1

Homotopic monoids and $A_\infty$ spaces

1

Connected covering spaces of a homotopy colimit

1

Good book on Riemann surfaces and Galois theory?

1

What are some examples of mathematicians who had an unconventional education?

1

Multigraphs and Social Network Analysis

1

Numerable covers from the point of view of Grothendieck topologies

1

Removing a simplicial subset from a simplicial set

1

I know that you know…

1

Second homotopy groups of 3-complexes and Fenn’s spiders.

1

What constitutes the division between discrete and non-discrete math? Are there any math subject where it’s being blurred?

1

Categorification of coends and ends