Ronnie Brown's user avatar
Ronnie Brown's user avatar
Ronnie Brown's user avatar
Ronnie Brown
  • Member for 13 years, 10 months
  • Last seen more than a month ago
8 votes
Accepted

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

8 votes

Is there a sense in which the homotopy theory of simplicial sets is the "paradigmatic" one?

8 votes

Usage of set theory in undergraduate studies

8 votes

Fundamental group of a topological pullback

8 votes

How do you define the strict infinity groupoids in Homotopy Type Theory?

7 votes

Postnikov's algebraic reconstruction of cohomology from homotopy invariants

7 votes

Example of an unnatural isomorphism

7 votes

Groupoid actions on spaces

7 votes

Applications of knot theory

7 votes

How many proofs that $\pi_n(S^n)=\mathbb{Z}$ are there?

7 votes

Non-rigorous reasoning in rigorous mathematics

7 votes

First mention of the fundamental bigroupoid of a space?

7 votes

Homotopy equivalence of certain kinds of adjunction spaces

7 votes

Higher categories as data structures

7 votes

How can I understand the "groupoid" quotient of a group action as some sort of "product"?

7 votes

What should be offered in undergraduate mathematics that's currently not (or isn't usually)?

7 votes

Is there any generalization of the Dold-Kan correspondence?

7 votes

Does "compact iff projections are closed" require some form of choice?

7 votes
Accepted

Intersection between category theory and graph theory

7 votes

Interesting and accessible topics in graph theory

7 votes

Why is a topology made up of 'open' sets?

6 votes

Homotopical Combinatorics

6 votes

Crossed module structure on homotopy groups

6 votes

Concrete example of $\infty$-categories

6 votes

Justifying/Explaining math research in a public address

6 votes

Are k-spaces named for Kelley?

6 votes

Writing papers in pre-LaTeX era?

6 votes

Excellent mathematical explanations

6 votes

Why is Set, and not Rel, so ubiquitous in mathematics?

6 votes

Computing homotopies

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