- Reference
- Useful and interesting web sites

# Useful and Interesting Web Sites

## News and Information

Math articles in Quanta Magazine

**Plus Magazine**
is an online magazine about mathematics.

**Art of Problem Solving** is an online community of math teachers and students of all levels from elementary school through graduate school.

## Mathematical Discussions

Mathematics Stack Exchange
is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

Math Overflow
is a question and answer site for professional mathematicians.

Math subreddit

## Blogs

Blog of math blogs

The AMS blog on math blogs

Another list of math blogs

Blogs hosted by the American Mathematical Society

Terence Tao

The n-Category Café
;

Ars Mathematica

The Unapologetic Mathematician

Modulo Errors

A Neighborhood of Infinity

Not Even Wrong

Shtetl-Optimized

## Reference

**Wikipedia**
is an online encyclopedia with extensive coverage of mathematics,
including detailed descriptions of mathematical terms and theorems.
There is also a lot of information of prominent mathematicians, past and present.

**PlanetMath**
has a mathematical encyclopedia as well as free online
expository papers and books

**MathWorld** is a
online math reference maintained by Wolfram research.

## Professional Organizations

The **American Mathematical Society**
is the leading professional society for mathematicians. You can find interesting nontechnical articles in the **Notices of the AMS**.

The **Mathematical Association of America** is another professional organization focused mostly on undergraduate math education. They have a good collection of regular **online columns**.

**Society for Industrial and Applied Mathematics** is the leading professional society for applied mathematicians working in either academia or industry.