Stack Exchange Network

Stack Exchange network consists of 176 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…
  1. 0
  2. +0
    • Back to MathOverflow Return to the main site
    • Tour Start here for a quick overview of the site
    • Help Center Detailed answers to any questions you might have
    • What's Meta? How Meta is different from the main site
    • About Us Learn more about Stack Overflow the company
    • Business Learn more about hiring developers or posting ads with us
  3. Log in Sign up
  4. current community

    • MathOverflow
      help chat
    • MathOverflow Meta

    your communities

    Sign up or log in to customize your list.

    more stack exchange communities

    company blog
MathOverflow
  1. Home
    1. Questions
    2. Tags
    3. Users
    4. Unanswered
Profile Activity
Main user
Network profile
10,664
reputation
10
2

Zhen Lin

Apparently, this user prefers to keep an air of mystery about them.

  • zll22.user.srcf.net/profile
  • Member for 10 years, 1 month
  • 4 profile views
  • Last seen Sep 9 '20 at 9:14

Communities (11)

  • Mathematics 73.6k 73.6k 77 gold badges139139 silver badges272272 bronze badges
  • MathOverflow 10.7k 10.7k 11 gold badge3232 silver badges5454 bronze badges
  • Japanese Language 5.1k 5.1k 11 gold badge2424 silver badges3030 bronze badges
  • TeX - LaTeX 1.5k 1.5k 11 gold badge1414 silver badges1919 bronze badges
  • Linguistics 287 287 11 silver badge44 bronze badges
  • View network profile

Top network posts

  • 84 What concept does an open set axiomatise?
  • 79 Sheaf cohomology: what is it and where can I learn it?
  • 67 Why did my friend lose all his money?
  • 66 Simplicial homology of real projective space by Mayer-Vietoris
  • 52 Why is the category of fields seemingly so poorly behaved?
  • 45 In set theory, how are real numbers represented as sets?
  • 42 Proving the snake lemma without a diagram chase
  • View more network posts →

Keeping a low profile.

This user hasn't posted yet.

Badges (12)

Gold

—

Silver

10

Rarest

  •  Yearling
    × 10
    Dec 17

Bronze

2

Rarest

  •  Critic
    Jun 6 '16
  •  Supporter
    Jul 5 '13
View all badges →
MathOverflow Meta
  • Help
  • Chat
  • Contact
  • Mobile
Company
  • Stack Overflow
  • For Teams
  • Advertise With Us
  • Hire a Developer
  • Developer Jobs
  • About
  • Press
  • Legal
  • Privacy Policy
  • Terms of Service
Stack Exchange
Network
  • Technology
  • Life / Arts
  • Culture / Recreation
  • Science
  • Other
  • Stack Overflow
  • Server Fault
  • Super User
  • Web Applications
  • Ask Ubuntu
  • Webmasters
  • Game Development
  • TeX - LaTeX
  • Software Engineering
  • Unix & Linux
  • Ask Different (Apple)
  • WordPress Development
  • Geographic Information Systems
  • Electrical Engineering
  • Android Enthusiasts
  • Information Security
  • Database Administrators
  • Drupal Answers
  • SharePoint
  • User Experience
  • Mathematica
  • Salesforce
  • ExpressionEngine® Answers
  • Stack Overflow em Português
  • Blender
  • Network Engineering
  • Cryptography
  • Code Review
  • Magento
  • Software Recommendations
  • Signal Processing
  • Emacs
  • Raspberry Pi
  • Stack Overflow на русском
  • Code Golf
  • Stack Overflow en español
  • Ethereum
  • Data Science
  • Arduino
  • Bitcoin
  • Software Quality Assurance & Testing
  • Sound Design
  • Windows Phone
  • more (28)
  • Photography
  • Science Fiction & Fantasy
  • Graphic Design
  • Movies & TV
  • Music: Practice & Theory
  • Worldbuilding
  • Video Production
  • Seasoned Advice (cooking)
  • Home Improvement
  • Personal Finance & Money
  • Academia
  • Law
  • Physical Fitness
  • Gardening & Landscaping
  • Parenting
  • more (10)
  • English Language & Usage
  • Skeptics
  • Mi Yodeya (Judaism)
  • Travel
  • Christianity
  • English Language Learners
  • Japanese Language
  • Chinese Language
  • French Language
  • German Language
  • Biblical Hermeneutics
  • History
  • Spanish Language
  • Islam
  • Русский язык
  • Russian Language
  • Arqade (gaming)
  • Bicycles
  • Role-playing Games
  • Anime & Manga
  • Puzzling
  • Motor Vehicle Maintenance & Repair
  • Board & Card Games
  • Bricks
  • Homebrewing
  • Martial Arts
  • The Great Outdoors
  • Poker
  • Chess
  • Sports
  • more (16)
  • MathOverflow
  • Mathematics
  • Cross Validated (stats)
  • Theoretical Computer Science
  • Physics
  • Chemistry
  • Biology
  • Computer Science
  • Philosophy
  • Linguistics
  • Psychology & Neuroscience
  • Computational Science
  • more (10)
  • Meta Stack Exchange
  • Stack Apps
  • API
  • Data
  • Blog
  • Facebook
  • Twitter
  • LinkedIn
  • Instagram

site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. rev 2021.1.18.38333