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
49 votes

Compelling evidence that two basepoints are better than one

30 votes

Modern Mathematical Achievements Accessible to Undergraduates

30 votes
Accepted

Why are we interested in the Fundamental Groupoid of a Space?

27 votes

Compact open topology

24 votes
Accepted

The higher Van Kampen Theorems and computation of the unstable homotopy groups of spheres

23 votes

Do we still need model categories?

23 votes

Presenting work in progress

21 votes

Where to publish a math textbook in Creative Commons

20 votes

Nice proof of the Jordan curve theorem?

20 votes

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

19 votes

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

19 votes

How important are publications for undergrads?

18 votes

What is the difference between holonomy and monodromy?

18 votes

Demonstrating that rigour is important

18 votes
Accepted

Generalized categories for "higher homotopy groupoids"

17 votes

Conjectures in Grothendieck's "Pursuing stacks"

17 votes

Is there a nice application of category theory to functional/complex/harmonic analysis?

17 votes

Undergraduate Topology

17 votes

Grothendieck on Topological Vector Spaces

16 votes

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

16 votes

Brandt's definition of groupoids (1926)

15 votes

Has any attempt been made to classify finite groupoids?

15 votes

Cubical vs. simplicial singular homology

14 votes

Getting nervous refereeing a paper

14 votes
Accepted

What is higher dimensional algebra?

14 votes

Is there a category of topological-like spaces that forms a topos?

14 votes
Accepted

Associativity of topological join and join of spheres

13 votes

Is the fundamental group functor a left-adjoint?

12 votes

Autobiographies of mathematicians

12 votes

Most striking applications of category theory?

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