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Toby Bartels

http://TobyBartels.name/

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21
Is $\frac{\textrm{d}y}{\textrm{d}x}$ not a ratio?
math.stackexchange.com

19
What is the most useful non-existing object of your field?
mathoverflow.net

16
Segal's Original Definition of a Topological Category
mathoverflow.net

15
Why is a topology made up of 'open' sets?
mathoverflow.net

12
Not quite adjoint functors
mathoverflow.net

12
Why did Ant-Man appear in the Broadway musical?
scifi.stackexchange.com

10
Interesting Applications of the Classical Stokes Theorem?
mathoverflow.net

10
Set theories without "junk" theorems?
mathoverflow.net

9
The second differential versus the differential of a differential form
math.stackexchange.com

9
Does equality between sets contradict the philosophy behind structural set theory?
mathoverflow.net

8
What is an ideal-supporting algebra?
mathoverflow.net

8
Observables and dimensional analysis
mathoverflow.net

8
The formal p-adic numbers
mathoverflow.net

8
What are the occurrences of stacks outside algebraic geometry, differential geometry, and general topology?
mathoverflow.net

6
Chomp! without the law of the excluded middle
mathoverflow.net

6
What is a good handwriting font for mathematics?
matheducators.stackexchange.com

6
Practical experience with teaching differentials in freshman calc?
matheducators.stackexchange.com

6
Why do we teach that every line is a linear function?
matheducators.stackexchange.com

5
Show that $f(a)=f(a-1).$
math.stackexchange.com

5
Differential forms: $dx \wedge dy$ vs $dx dy$
math.stackexchange.com

5
Math blog directory
mathoverflow.net

5
If $A,B,C\in(0,\pi)$ then prove that $\sin A\sin B\sin C-\sin A-\sin B-\sin C+2\ge0$
math.stackexchange.com

5
Help me understand easy (not for me) concepts in volume integral
math.stackexchange.com