Stack Exchange Network

Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange
Loading…
    • Tour Start here for a quick overview of the site
    • Help Center Detailed answers to any questions you might have
    • Meta Discuss the workings and policies of this site
    • About Us Learn more about Stack Overflow the company
    • Business Learn more about our products
  1. current community

    • English Language Learners
      help chat
    • English Language Learners Meta

    your communities

    Sign up or log in to customize your list.

    more stack exchange communities

    company blog
  2. Log in
  3. Sign up
English Language Learners
  1. Home
    1. Public
    2. Questions
    3. Tags
    4. Users
    5. Unanswered
    1. Teams
      Stack Overflow for Teams – Start collaborating and sharing organizational knowledge. Create a free Team Why Teams?
    2. Teams
    3. Create free Team

Teams

Q&A for work

Connect and share knowledge within a single location that is structured and easy to search.

Learn more about Teams
user avatar
user avatar
user avatar
John Douma
  • Member for 11 months
  • Last seen this week
  • Network profile
Profile Activity
Stats
101
reputation
0
reached
0
answers
0
questions
Communities
View all
  • Mathematics
    8.3k
  • Software Engineering
    119
  • MathOverflow
    101
  • Stack Overflow
    101
  • Music: Practice & Theory
    101
Badges
This user doesn’t have any gold badges yet.
This user doesn’t have any silver badges yet.
2
bronze badges
  •  
    Commentator
    Jul 28
  •  
    Supporter
    Jan 1
Posts

This user hasn’t posted yet.

Top network posts
View all network posts
28
Proof: 1007 can not be written as the sum of two primes.
18
Counting binary operations on a set with $n$ elements
12
How do I find a point a given distance from another point along a line?
12
What is sum of all positive odd integers less than $1000$?
12
What is the Idea of a Relative Open Set?
English Language Learners
  • Tour
  • Help
  • Chat
  • Contact
  • Feedback
Company
  • Stack Overflow
  • Teams
  • Advertising
  • Collectives
  • Talent
  • About
  • Press
  • Legal
  • Privacy Policy
  • Terms of Service
  • Cookie Settings
  • Cookie Policy
Stack Exchange Network
  • Technology
  • Culture & recreation
  • Life & arts
  • Science
  • Professional
  • Business
  • API
  • Data
  • Blog
  • Facebook
  • Twitter
  • LinkedIn
  • Instagram

Site design / logo © 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. rev 2022.8.12.42806

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.