11

Answers
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4
How do I make the conceptual transition from multivariable calculus to differential forms?
5
Is there any formal foundation to ultrafinitism?
1
Is PA consistent? do we know it?
2
Which topological spaces admit a nonstandard metric?
2
Set theory and Model Theory
10
History Question: AUTObiography of Mathematicians
2
The set-theoretic multiverse as a (bi)category
1
Inconsistent theory with long contradiction
2
Why is the concept of topos a “metamorphosis” of the concept of space?
5
What is the status of irrational numbers within finitism/ultrafinitism?
1
Given a Grothendieck topos, what does its localic groupoid look like?