Toby Bartels's user avatar
Toby Bartels's user avatar
Toby Bartels's user avatar
Toby Bartels
  • Member for 13 years, 7 months
  • Last seen this week
21 votes

What is the most useful non-existing object of your field?

17 votes

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

17 votes
Accepted

Segal's Original Definition of a Topological Category

13 votes

Set theories without "junk" theorems?

12 votes

Not quite adjoint functors

10 votes

Interesting Applications of the Classical Stokes Theorem?

9 votes

Does equality between sets contradict the philosophy behind structural set theory?

8 votes

What are the occurrences of stacks outside algebraic geometry, differential geometry, and general topology?

8 votes
Accepted

What is an ideal-supporting algebra?

8 votes

Observables and dimensional analysis

8 votes

The formal p-adic numbers

6 votes

Chomp! without the law of the excluded middle

5 votes

Math blog directory

4 votes

In the category of sets epimorphisms are surjective - Constructive Proof?

4 votes

Does weak countable choice imply that the Cauchy reals are Dedekind complete?

3 votes

Ordinals in constructive mathematics ? (references)

3 votes

a dcpo seen as a category: when does a dcpo map induce a functor with an adjoint?

3 votes
Accepted

Is there a characterization of the topos of finite sets in the internal language?

2 votes

Observables and dimensional analysis

2 votes

Is the generalized Baire space complete?

2 votes

Using slides in math classroom

1 vote

Why do we teach calculus students the derivative as a limit?

1 vote

Leibnizian calculus textbook

1 vote
Accepted

Sober except not $T_0$?

0 votes

Uniform continuity and boundedness