As of May 31, 2023, we have updated our Code of Conduct.

Oliver Roche-Newton

Member for 11 years
Last seen this week

oliverrochenewton.wix.com/…

Summary

Reputation

1,448

1.4k
1.3k
1.2k

2020
2021
2022
2023

Top tag

additive-combinatorics

Next privilege

2,000 Rep.

Edit posts

Badges

1

12

16

Newest

Organizer

Next badge

0/1

Custodian

Answers

View all 7 answers

Score Activity Newest

8

Small set such that $\{1 , \ldots , n\} \cdot A = \mathbb{Z} / p \mathbb{Z}$

Oct 3, 2016

7

Bound of size $X\subset \mathbb{Z}/N\mathbb{Z}$ which satisfies $X+X=\mathbb{Z}/N\mathbb{Z}$

Feb 19, 2019

7

Sum and product estimate over integers, rationals, and reals

Jun 5, 2014

6

Nontrivial expansion in sumsets

Nov 27, 2019

6

Is $AA+A$ always at least as large as $A/A$?

Jun 26, 2018

Questions

Score Activity Newest Views

111

Is the set $ AA+A $ always at least as large as $ A+A $?

Apr 27, 2015

12

covering disks with smaller disks

May 25, 2012

8

Is $AA+A$ always at least as large as $A/A$?

Nov 4, 2015

4

How many convex or concave subsets are contained in an arbitrary set of $n$ real numbers?

Jan 19, 2022

Tags

additive-combinatorics

37

Score

10

posts

nt.number-theory

20

Score

6

posts

co.combinatorics

14

Score

6

posts

discrete-geometry

2

Score

1

post

convexity

0

Score

1

post

Reputation

+2

For a finite set A of positive reals, prove that the set A + A - A contains at least as many positive as negative elements

+10

covering disks with smaller disks

+10

A sum-product estimate in Z/pZ

+10

Is the set $ AA+A $ always at least as large as $ A+A $?

Badges

View all badges

1

gold badge

Great Question

Jun 24, 2018

12

silver badges

Favorite Question

Oct 20, 2015
Good Question

Apr 27, 2015
Notable Question

Apr 29, 2015

16

bronze badges

Mortarboard

Apr 27, 2015
Organizer

May 25
Self-Learner

Jun 26, 2018

Accounts

1,448
1
12
16

Active bounties (0)

Active Offered Earned

This user has no active bounties

Votes cast

24

upvotes

9

question votes

15

answer votes