Salvo Tringali

Member for 13 years, 5 months
Last seen this week

Shijiazhuang, Hebei, China

Summary

Reputation

10,548

10.5k
8.7k
6.8k

2021
2022
2023
2024

Top tag

nt.number-theory

Next privilege

15,000 Rep.

Protect questions

Badges

2

29

64

Newest

Nice Question

Next badge

137/600

Electorate

Impact

~172k

people reached

0

helpful flags

358

votes cast

Questions

View all 162 questions

21

Is there any non-commutative ring such that every element other than the identity is a zero divisor?

Jun 20, 2021

18

An elementary, short proof that the group of units of the ring of integers of a number field is finitely generated

Apr 16, 2017

17

An elementary proof that, for every fixed $n \in \mathbf N^+$, there are infinitely many primes $\equiv -1 \bmod n$

Apr 27, 2017

17

Do $X$ and $Y$ have the same cardinality if their families of finite subsets do?

Jul 2, 2023

14

The limit superior of $\varphi(2^n-1)/(2^n-1)$

Oct 18, 2017

Answers

View all 77 answers

33

How Composite can $2^n-1$ be, infinitely often?

Oct 16, 2017

27

Sums of sets of lower density 0

May 6, 2015

18

Sets that are not sum of subsets

Oct 31, 2021

13

Polynomials leaving invariant the Gaussian integers

Jul 24, 2017

12

Is there any non-commutative ring such that every element other than the identity is a zero divisor?

Jun 20, 2021

Tags

View all 93 tags

nt.number-theory

119

Score

48

posts

ra.rings-and-algebras

71

Score

70

posts

reference-request

62

Score

135

posts

semigroups-and-monoids

42

Score

84

posts

additive-combinatorics

41

Score

25

posts

Reputation

+10

Reference request: a cousin to the log semiring

+10

On the notion of partial semigroup

+10

Sets that are not sum of subsets

+10

Reference to an elementary lemma (implying existence and uniqueness of the base-$b$ representation)

Badges

View all badges

2

gold badges

Socratic

May 23, 2020
Fanatic

Nov 14, 2017

29

silver badges

Inquisitive

Jul 2, 2014
Civic Duty

Jul 22, 2023
Constituent

Sep 26, 2022

64

bronze badges

Cleanup

Jun 25, 2013
Explainer

Oct 12
Quorum

Feb 9, 2016

Accounts

View all 6 accounts

10.5k
2
29
64

1,050
8
16

English Language & Usage

243
1
11

152
5

101
1

Active bounties (0)

This user has no active bounties

Votes cast

291

upvotes

67

downvotes

137

question votes

221

answer votes

3

this month

2

this week

1

today