Skip to main content
Mathematics
Jujustum's user avatar
Jujustum's user avatar
Jujustum's user avatar
Jujustum
  • Member for 3 years, 1 month
  • Last seen this week
  • France
Profile Activity
Stats
1,197
reputation
7k
reached
32
answers
6
questions
Communities
About

French person who enjoys puzzles.

Badges
View all badges
This user doesn’t have any gold badges yet.
4
silver badges
14
bronze badges
Top tags
View all tags
14
Score
6
Posts
16
Posts %
10
Score
6
Posts
16
Posts %
10
Score
5
Posts
13
Posts %
10
Score
5
Posts
13
Posts %
7
Score
4
Posts
11
Posts %
7
Score
3
Posts
8
Posts %
Top posts
View all questions and answers
7
$\sin (\frac{\pi}{4n}) \ge \frac{\sqrt{2}}{2n}$ for all $n\in \mathbb N$
Jun 8, 2021
6
Shouldn’t $\tan^{-1}(\mathbb{R})$ be closed?
Jun 28, 2021
6
Probability of card being 7 of diamonds given the card is red
May 29, 2021
5
Real coefficients such that any matrix is invertible
May 22, 2021
5
Condition on endomorphisms satisfying $\operatorname{Ker} f=\operatorname{Im} f$
Jun 20, 2021
5
A probability problem about picking balls - and somehow related to solar panels
Aug 24, 2023
5
If $X^6+X^5-2X^4-X^2-X+2=0$, what values of $\mbox{tr}(X)$ are admissible?
Jul 24, 2021
4
Proof that $\lim_{x\to\infty}\left(\frac{x}{x-1}\right)^x=e$.
May 26, 2021
4
$x^{x\sqrt{x}} = (x\sqrt{x})^x$: How can I correctly explain the existence of the root $x=1$?
Jun 2, 2021
4
How do I calculate the sum of sum of triangular numbers?
Jun 25, 2021
Top network posts
View all network posts
45
A strange operator on my new calculator
39
How to solve 1 2 3 4 5 = 5 4 3 2 1 (insert five pluses to make it equal)? A thorough solution needed
25
$\pi$ = 13, $\sqrt{2}$ = 7, $e$ =?
19
My doctor gave me this IQ test - what's your diagnosis?
19
BBBBBBBBBB -> BB