r/math

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r/learnmath
135k  subs
Post all of your math-learning resources here. Questions, no matter how basic, will be answered (to the best ability of the online subscribers).
https://reddit.com/r/learnmath/
r/Physics
887k  subs
The aim of /r/Physics is to build a subreddit frequented by physicists, scientists, and those with a passion for physics. Papers from physics journals (free or otherwise) are encouraged. Posts should be pertinent, meme-free, and generate a discussion about physics. Please report trolls and intentionally misleading comments.
https://reddit.com/r/Physics/
r/compsci
618k  subs
Computer Science Theory and Application. We share and discuss any content that computer scientists find interesting. People from all walks of life welcome, including hackers, hobbyists, professionals, and academics.
https://reddit.com/r/compsci/
r/reddit.com
818k  subs
The original subreddit, now archived.
https://reddit.com/r/reddit.com/
r/askscience
18m  subs
Ask a science question, get a science answer.
https://reddit.com/r/askscience/
r/linux
423k  subs
All things Linux and GNU/Linux -- this is neither a community exclusively about the kernel Linux, nor is exclusively about the GNU operating system.
https://reddit.com/r/linux/
r/statistics
84k  subs
This is a subreddit for discussion on all things dealing with statistical theory, software, and application. We welcome all researchers, students, professionals, and enthusiasts looking to be a part of an online statistics community.
https://reddit.com/r/statistics/
A subreddit for all questions related to programming in any language.
https://reddit.com/r/learnprogramming/
r/TrueReddit
445k  subs
A subreddit for really great, insightful articles and discussion. Please follow reddiquette, and READ THE ARTICLE before voting or discussing. Downvotes should only be used if something doesn’t contribute to intelligent discussion, not just because you disagree. Please use the report button if you see something that doesn’t belong.
https://reddit.com/r/TrueReddit/
r/offbeat
477k  subs
Offbeat: funny, weird, sad, strange or quirky news that's just....just offbeat :)
https://reddit.com/r/offbeat/
r/Python
419k  subs
news about the dynamic, interpreted, interactive, object-oriented, extensible programming language Python
https://reddit.com/r/Python/
r/askmath
12k  subs
A subreddit for math questions. Do you have a math question? Can you help others with their math questions? Come join us!
https://reddit.com/r/askmath/
r/AskPhysics
33k  subs
A subreddit to draw simple physics questions away from /r/physics. No real rules; ask away. If your basic physics question isn't answered in a day, you can post it to /r/physics if you mention that you didn't get an answer on /r/AskPhysics (unless it's a homework-related physics question).
https://reddit.com/r/AskPhysics/
r/engineering
254k  subs
The hub for all content related to the engineering discipline.
https://reddit.com/r/engineering/
r/mathematics
33k  subs
/r/mathematics is a subreddit dedicated to focused questions and discussion concerning mathematics.
https://reddit.com/r/mathematics/
This a place for engineering students of any discipline to discuss study methods, get homework help, get job search advice, and find a compassionate ear when you get a 40% on your midterm after studying all night.
https://reddit.com/r/EngineeringStudents/
r/wikipedia
298k  subs
The most interesting pages on Wikipedia.
https://reddit.com/r/wikipedia/
r/scifi
1m  subs
Science Fiction, or Speculative Fiction if you prefer. Fantasy too. Asimov, Bradbury, Clarke, Dick, Heinlein and other SF books. SF movies and TV shows. Fantasy stuff like Tolkien and Game of Thrones. Laser guns, space ships, and time travel. etc. Star Trek, Battlestar, Star Wars, etc.
https://reddit.com/r/scifi/
r/chess
145k  subs
Everything to do with chess. Game analysis, current events, and more!
https://reddit.com/r/chess/
A place for poking fun at the bad mathematics that plagues the internet
https://reddit.com/r/badmathematics/
r/bestof
5m  subs
The very best comments on reddit.
https://reddit.com/r/bestof/
Welcome to the University of Reddit, a place for redditors to teach redditors.
https://reddit.com/r/UniversityofReddit/