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Thomas
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59 votes
9 answers
9k views

Where to begin with foundations of mathematics

21 votes
1 answer
7k views

Can a function be increasing *at a point*?

11 votes
2 answers
2k views

Rigour vs intuition

11 votes
2 answers
656 views

Explaining why we can't "find" an antiderivative of $f(t) = e^{t^2}$.

10 votes
1 answer
644 views

Proving results in representation theory from category theory

9 votes
2 answers
2k views

Construction of the Hyperreal numbers

7 votes
5 answers
3k views

True or false or not-defined statements

4 votes
4 answers
4k views

Second order partial derivatives - notation

4 votes
3 answers
678 views

What is a non-degenerate module?

4 votes
1 answer
694 views

Repeated logarithm

3 votes
2 answers
2k views

Formal Dirichlet-Bourbaki definition of function

3 votes
1 answer
474 views

$F$-rational points of variety/alg. group in Springer

3 votes
1 answer
2k views

What is a rational character?

3 votes
5 answers
2k views

$[\frac{1}{x} = 1$ for all real numbers $x]$ is not true or false

2 votes
3 answers
5k views

What does "increases in proportion to" mean?

1 vote
2 answers
240 views

Algebra with two generators and relations