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Answers
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46
How to picture $\mathbb{C}_p$?
33
Should the formula for the inverse of a 2x2 matrix be obvious?
32
Zagier’s one-sentence proof of Fermat’s theorem.
22
Why is the fundamental group of a compact Riemann surface not free ?
22
The generalization of Brouwer’s fixed point theorem?
22
Can a certain sum converge to 0?
19
A set for which it is hard to determine whether or not it is countable.
17
Slick ways to make annoying verifications
16
Cubic polynomial mapping primes to primes
15
Algebraic P vs. NP
14
Is there a non-projective flat module over a local ring?
14
Elementary examples of the Weil conjectures
13
Definition of area
13
Toy Models of Quantum Mechanics
13
Topos theory reference suitable for undergraduates
13
Liouville’s theorem with your bare hands
12
Special cases of Dirichlet’s theorem
10
One point in the post of Terence Tao on Ax-Grothendieck theorem
10
What elementary problems can you solve with schemes?
10
Research trends in geometry of numbers?
9
Two quetions on complex geometry.
9
Shape of snowflakes
9
Algorithm or theory of diagram chasing
8
Elementary results with p-adic numbers
8
Explicit computations of the étale homotopy type?
7
Serre’s Analogue of the Weil Conjectures for Non-Compact Kahler Manifolds
7
Simple but serious problems for the edification of non-mathematicians
7
Equations for an algebraic gömböc
7
Irrational Numbers and the Riemann Surface of a Multi-Valued Function
7
Modern algebraic geometry vs. classical algebraic geometry
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