Mathematics
Alexey Ustinov's user avatar
Alexey Ustinov's user avatar
Alexey Ustinov's user avatar
Alexey Ustinov
  • Member for 10 years
  • Last seen this week
Profile Activity
Stats
291
reputation
4k
reached
11
answers
3
questions
Communities
View all
About

Solving hard problems by easy methods

Badges
View all badges
This user doesn’t have any gold badges yet.
4
silver badges
13
bronze badges
Top tags
View all tags
8
Score
4
Posts
29
Posts %
8
Score
2
Posts
14
Posts %
7
Score
1
Posts
7
Posts %
2
Score
2
Posts
14
Posts %
2
Score
1
Posts
7
Posts %
1
Score
2
Posts
14
Posts %
Top posts
View all questions and answers
All Questions Answers
Score Newest
answer
7
Fundamental unit in the ring of integers $\mathbb Z[\frac{1+\sqrt{141}}{2}]$
Apr 2, 2015
question
2
The origin of "The Lost Boarding Pass Problem"
Apr 3, 2021
answer
2
Liouville Theorem
Nov 22, 2013
question
1
On some special 5-tuples in projective space $PG(3,2)$
Aug 23, 2019
question
1
When does Hesse curve coincide with the original curve?
Oct 7, 2022
answer
1
Short proof of Seidel-Stern theorem on continued fractions
Dec 13, 2013
answer
1
Farey fractions in arithmetic progression
Jan 3, 2014
answer
1
Prime dividing binomial coefficient involving prime power
Oct 7, 2015
answer
0
Sorting circles sizes with points in integers lattice
Apr 2, 2015
answer
0
Prove this form $2^{n+2}-7a^2_{n}$ always is square numbers.
Apr 7, 2015
Top network posts
View all network posts
53
Most intriguing mathematical epigraphs
49
Rediscovery of lost mathematics
42
Examples of unexpected mathematical images
39
Rediscovery of lost mathematics
39
'Important' applications of p-adic numbers outside of algebra (and number theory).

Your privacy

By clicking “Accept all cookies”, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy.