MathOverflow
Fedor Petrov's user avatar
Fedor Petrov's user avatar
Fedor Petrov's user avatar
Fedor Petrov
  • Member for 13 years, 3 months
  • Last seen this week
Profile Activity
Stats
94,861
reputation
1.6m
reached
1,124
answers
146
questions
Communities
View all
Badges
View all badges
9
gold badges
223
silver badges
397
bronze badges
Top tags
View all tags
2,172
Score
402
Posts
32
Posts %
1,775
Score
266
Posts
21
Posts %
930
Score
135
Posts
11
Posts %
594
Score
99
Posts
8
Posts %
585
Score
91
Posts
7
Posts %
573
Score
150
Posts
12
Posts %
Top posts
View all questions and answers
All Questions Answers
Score Newest
question
165
17 camels trick
Jun 7, 2017
answer
69
integral of a "sin-omial" coefficients=binomial
Nov 19, 2016
answer
58
Examples of notably long or difficult proofs that only improve upon existing results by a small amount
Sep 6, 2018
question
54
If any open set is a countable union of balls, does it imply separability?
Sep 18, 2014
answer
51
The number $\pi$ and summation by $SL(2,\mathbb Z)$
Sep 16, 2016
answer
43
Prove that expression is integer
Jul 12, 2015
answer
40
A curious sin-integral
Jun 16, 2017
answer
39
Important formulas in combinatorics
Aug 17, 2015
answer
39
Does there exist a graph with maximum degree 8, chromatic number 8, clique number 6?
Oct 18, 2017
answer
37
How to prove $e^x\left|\int_x^{x+1}\sin(e^t) \,\mathrm d t\right|\le 1.4$?
Mar 10, 2020
Top network posts
View all network posts
25
Does $8a+5$ ever divide $b^2+8$?
11
Can we partition the plane like this?
7
Prove $ae^{\frac{x}{a}} + be^{-\frac{x}{b}}\leq e^{\frac{x^2}{8a^2b^2}}, \forall x \in \mathbb{R}$ if $a, b > 0; a + b = 1$
6
Trace of symmetric positive semidefinite matrix when diagonalized (as a bilinear form) in a non-orthogonal basis
6
How to prove specific inequality, assuming $\prod\limits_{i=1}^{n}(a_{i}-1)=1$

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.