- Notes and pages on topics in math
- Math-related organizations and Web sites
- Free mathematical software

*Note:* I only link to pages that I use
myself. If you want a page with dozens of math-related links, you could
just do a Google search on "math"; I'm being selective to
avoid overwhelming people with too many choices. But the fact that I
haven't linked to a page doesn't mean I think badly of it.

Some of the notes are web pages, usually accompanied by PDF (Adobe Acrobat) files for printing. Some of the older notes are in PostScript format; I plan to convert them to web pages with PDF as time permits.

Please read the PostScript help file before you download any of the notes in PostScript format.

I appreciate hearing about mistakes, which I'll correct as soon as I can. Some of the notes are very incomplete; there may be a few worked-out examples, with little exposition.

- Basic algebra and trigonometry
- Calculus
- Math proof
- Linear algebra
- Notes on linear algebra
- Functions for performing row and column operations, finding the convolution of two functions, and computing the exponential of a matrix.(matrixop.m [3175 bytes]; Mathematica package).

- Abstract algebra
- Differential equations
- Notes on differential equations (PostScript) [These have not been revised in a long time!]
- The existence and uniqueness theorem for ordinary differential equations via Picard iteration (picard.ma [37K]; Mathematica 2.2 Notebook).
- Functions for performing row and column operations, finding the convolution of two functions, and computing the exponential of a matrix.(matrixop.m [3175 bytes]; Mathematica package).

- Elementary number theory
- Notes on elementary number theory
- (GIMPS) The Great Internet Mersenne Prime Search. Use your computer to help find the next Mersenne prime.

- Topology
- Notes on point-set topology (PostScript) [These have not been revised in a long time!]

The *Mathematica Notebooks* require at least Mathematica 2.1.

- The American Mathematical Society is a professional organization whose primary focus is on research.
- The Mathematical Association of America is a professional organization whose primary focus is on teaching.
- The TeX Users Group
is devoted to TeX, a computer typesetting system. TeX is
the
*de facto*standard for technical typesetting among professional mathematicians. - The Front for the Mathematics ArXiv is the largest preprint server for the mathematical sciences.
- The Topology Atlas provides news, publications, and course resources related to topology.

- Maxima is a GPL-ed symbolic mathematics program. It does (among other things) algebra, calculus, and graphing in 2 and 3 dimensions.
- GAP is a free system for doing computational discrete algebra. It is best known as a tool for doing computational group theory.