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Top Questions
76
votes
Interesting and unexpected applications of $\pi$
pi
asked Feb 25, 2014 at 2:26
math.stackexchange.com
43
votes
Why the "self-referential number" function eventually fixes every point
combinatorics
puzzle
asked Sep 7, 2020 at 1:56
math.stackexchange.com
22
votes
Is the Banach-Tarski paradox realistic? Why is Volume not an invariant?
paradoxes
asked Apr 14, 2015 at 17:20
math.stackexchange.com
22
votes
A closed $1$-form on a convex open set is exact
real-analysis
differential-forms
asked Nov 15, 2015 at 23:27
math.stackexchange.com
19
votes
"categorical" proof of a seemingly symmetric statement about Noetherian/Artinian modules
abstract-algebra
category-theory
modules
noetherian
artinian
asked Sep 22, 2018 at 17:43
math.stackexchange.com
18
votes
Visual explanation of the following statement:
elementary-number-theory
visualization
asked Mar 20, 2014 at 11:41
math.stackexchange.com
16
votes
Coefficients of a polynomial also are the roots of the polynomial?
algebra-precalculus
polynomials
roots
asked Dec 24, 2013 at 16:04
math.stackexchange.com
14
votes
Change color of lineplot depending on data
python
matplotlib
asked Jul 10, 2015 at 16:08
stackoverflow.com
11
votes
TypeError constructor returned NULL while importing pyplot in ssh
python
windows
matplotlib
ssh
asked Jul 9, 2015 at 21:20
stackoverflow.com
11
votes
Finding the roots of $x^3 - 93x - 308$ extremely quickly?
algebra-precalculus
polynomials
asked Feb 1, 2014 at 21:11
math.stackexchange.com
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Top Answers
104
Visually deceptive "proofs" which are mathematically wrong
math.stackexchange.com
37
A fair coin is flipped 2k times. What is the probability that it comes up tails more often than it comes up heads?
math.stackexchange.com
20
What are some theorems that currently only have computer-assisted proofs?
math.stackexchange.com
18
Definition: rational prime, rational integer
math.stackexchange.com
14
Rolling a die until obtaining the face 6. Whats the expected amout of the sum?
math.stackexchange.com
14
Doubt regarding divisibility of the expression: $1^{101}+2^{101} \cdot \cdot \cdot +2016^{101}$
math.stackexchange.com
14
Explanation of a joke on abelian groups (grapes).
math.stackexchange.com
13
Is $\infty / \infty = 1$?
math.stackexchange.com
11
Evaluating $\sum_{n=1}^{\infty} \frac{1}{n^2+1}$
math.stackexchange.com
10
Is it true that $2^n$ is $O(n!)$?
math.stackexchange.com
9
Can a queue automaton recognize palindromes?
cs.stackexchange.com
9
How many 6 digit numbers are possible with no digit appearing more than thrice?
math.stackexchange.com
9
How to solve this algorithmic math olympiad problem?
math.stackexchange.com
9
Is the integer $0$ a deficient number?
math.stackexchange.com
7
Example of a very simple math statement in old literature which is (verbatim) a pain to understand
math.stackexchange.com
7
Is $\frac{0}{0}$ different from $\frac{1}{0}$?
math.stackexchange.com
7
Visual explanation of the following statement:
math.stackexchange.com
7
Prove that the equation $x^3 + 10000 = y^3$ has no solutions
math.stackexchange.com
7
Calculate the last digit of $3^{347}$
math.stackexchange.com
7
Does $p = x^2 + 9y^2$ for some $x$, $y \in \mathbb{Z}$ if and only if $p \equiv 1 \text{ mod }12$?
math.stackexchange.com
7
Is there a set $A$ such that power set of $A $ has a bijection with $\mathbb{N}$?
math.stackexchange.com
6
Evaluation of $\lim_{x\to 0} \frac{(1+x)^{1/x}-e+\frac{ex}{2}}{x^2}$
math.stackexchange.com
6
Let $H\unlhd G$ with $[G:H]=p$, prime. Let $K\le G$ and $K\not\subseteq H$. Then is $G=HK$?
math.stackexchange.com
6
Divisibility Of $(2^{32} +1)$
math.stackexchange.com
6
The value of an integral of a piecewise defined function
math.stackexchange.com
6
Find the value of this series
math.stackexchange.com
6
In the expansion of $(x_1+x_2+x_3+...+x_k)^n$ , the coefficient of $(x_1^{n_1} x_2^{n_2} ... x_k^{n_k} )$?
math.stackexchange.com
6
How to figure out if $x,y,z$ are postive reals and $x(1+y)+y(1+z)+z(1+x)=6\sqrt{xyz}$ then $xyz=1$
math.stackexchange.com
6
Find the value of a+b+c
math.stackexchange.com
6
What is zero times infinity?
math.stackexchange.com
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