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Snacc
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16 votes
6 answers
6k views

Function defined everywhere but continuous nowhere

13 votes
1 answer
331 views

ch. 8.3 Exercise 1 in Cohomology of Number Fields

11 votes
4 answers
291 views

Trying to understand pathological solution(s) to $f:f\rightarrow f$

8 votes
1 answer
604 views

What is the Prime at Infinity?

7 votes
1 answer
172 views

The remainder when dividing an arbitrary polynomial by a quadratic

5 votes
1 answer
333 views

Does there exist a right triangle such that all side lengths and angles in degrees are rational?

4 votes
3 answers
156 views

cyclic rational inequalities $\frac{1}{a^2+3}+\frac{1}{b^2+3}+\frac{1}{c^2+3}\leq\frac{27}{28}$ when $a+b+c=1$

4 votes
2 answers
299 views

Transfer between integrals and infinite sums

4 votes
2 answers
895 views

Why is there no “real analytic continuation”

4 votes
2 answers
125 views

Solving $\int_{0}^{2\pi}\frac{d\phi}{2+\sin(\phi)}$ with complex exponentials

3 votes
1 answer
298 views

Quotient groups of the Gaussian integers of the form $\mathbb{Z}[i]/ c\mathbb{Z}[i]$

3 votes
1 answer
111 views

Confusion about cohomology groups $H^i(S_3,\mathbb{Z})$

2 votes
3 answers
179 views

Triangle Area Problem with intersecting lines

2 votes
1 answer
43 views

Notation for differential equation involving inverse functions [duplicate]

1 vote
1 answer
634 views

What shape has the least perimeter for a given area

1 vote
1 answer
56 views

Steps to solve integral in analytic continuation problem

1 vote
0 answers
87 views

Areas of rectangles under $e^{-x^2}$

1 vote
1 answer
50 views

Probability problems involving AND operations in the condition

1 vote
1 answer
100 views

If $\overline{AD}=\overline{DC}$, $\angle ABC=30^\circ$, $\angle ADC=60^\circ$, $\overline{AB}=55$ and $\overline{CB}=48$, what is $\overline{BD}$?

0 votes
0 answers
69 views

Is there a mistake in Ch. 2 Exercise 41 (a) of Marcus number fields

0 votes
1 answer
149 views

Gauss sum over Legendre symbols combining residue and non-residue parts

0 votes
1 answer
69 views

Name of conjecture about correlation of $\lambda(n)$ and $\lambda(n+1)$

0 votes
0 answers
45 views

What could I expect from an undergraduate course in math?