User Haoran Chen - MathOverflow

Haoran Chen

Member for 6 years, 6 months
Last seen more than a week ago

Suzhou, Jiangsu, China

13 Questions

Score Activity Newest Views

41 votes

3 answers

4k views

A game on integers

asked Apr 8, 2018 at 2:10

10 votes

2 answers

364 views

How many small dots can be drawn in a region such that no three are "collinear"?

asked Aug 25, 2019 at 9:46

8 votes

1 answer

455 views

Knight's tour problem

asked May 29, 2019 at 14:45

5 votes

1 answer

179 views

Deg $n$ integral polynomial $P(x)$ with $n+1$ integer solutions to $0\leq P\leq d$

asked Jan 5, 2019 at 15:20

5 votes

1 answer

457 views

Growth order of numbers whose prime factors are all congruent to +1 or -1 modulo 8

asked Apr 21, 2018 at 11:27

3 votes

4 answers

303 views

Algebraic inequalities on different means

asked Jun 6, 2018 at 15:44

2 votes

0 answers

80 views

Given $N$, find the largest $U=ab=cd$ with $a,b,c,d\leq N$

asked Oct 9, 2017 at 13:58

2 votes

0 answers

46 views

Size of set of positive integers no sum of two distinct elements giving square

asked Sep 21, 2023 at 14:41

1 vote

0 answers

13 views

Estimate on the minimum distance from integer points on some fixed hyperplanes to a moving hyperplane

asked Jul 27, 2023 at 10:24

1 vote

1 answer

120 views

Find $N=p\cdot q \in \big(n^2, \ n(n+1)\big)$ with the "closest" factors $p, q$ in the sense of $p/q$

asked Oct 7, 2017 at 13:58

1 vote

0 answers

120 views

Positive integer solutions to $a^2b^2-(a-b)^2=s^2t^2-(s+t)^2$

asked May 22, 2018 at 14:53

0 votes

2 answers

117 views

Characters of integers of $4p^2q^2-(p\pm q)^2$ form

asked May 20, 2018 at 9:18

0 votes

2 answers

2k views

Lagrange Multipliers for two constraints, degenerate case

asked Apr 18, 2018 at 9:37