Some of the links may no longer be working and some of the software information may be out of date.

There is also a web page from the course as taught in the spring of 2000.

Goldsmith 312

781-736-3060

Email: gessel@brandeis.edu

Office hours: Tuesday and Thursday, 2 - 3

Goldsmith 311

781-736-3084

Email: maxima@brandeis.edu

Office hours: Wednesday, 12 - 1

- Nick Dufresne, An introduction to Schröder and unknown numbers
- Anton Geraschenko, An investigation of skyline polyominoes
- Robert Gross, A new application to the Josephus problem
- Efstathios Mytilinaios, Counting directed-convex polyominoes according to their perimeter
- Oleg Sofrygin, Counting the number of Dyck paths according to different types of parameters
- Eli A. Wolfhagen,An investigation of the Chung-Feller theorem and similar combinatorial identities

- First problem set
- Second problem set
- Research problems on lattice paths
- Research problems on polyominoes
- Tables and formulas

- The On-Line Encyclopedia of Integer Sequences
- MathSciNet
- Front for the Mathematics ArXiv
- JSTOR (Online acces to scanned papers from older journals.)
- Some online combinatorics journals
- Electronic Journal of Combinatorics
- Journal of Integer Sequences
- Séminaire Lotharingien de Combinatoire
- Two important combinatorics journals that you can access online.

### LaTeX example files to download

Here are some files that may be useful.- example.tex An example of a short mathematical paper written in LaTeX
- template.tex A "template" that you can use for writing a mathematical paper.
- reftemplate.tex Another sample paper that shows the format to use for including references in your paper.
- graphicsexample.tex , tree.eps , path.eps A LaTeX file and two epsf files that show how to include graphics in a LaTeX document. If you're using a Macintosh, you should download this encoded archive which has versions of the epsf files that you can see on the screen.

### TeX and LaTeX links

Here are some links to sites with information about TeX and LaTeX. You can find many further links through them.- The UK List of TeX Frequently Asked Questions on the Web See in particular their page of LaTeX tutorials.
- LaTeX General Help Another online reference.
- The TeX Users' Group More useful than the TUG home page is their TeX Resources on the Web
- LaTeX Project Page
- American Mathematical Society TeX Resources Page

- The AMS-LaTeX User's Guide. This tells you everything you might want to know about the features of AMS-LaTeX for typesetting mathematics that you won't find in a guide to generic LaTeX. This is a dvi file, so you will need OzTeX (or some other version of TeX) to view and print it. See also the AMS Short Math Guide for LaTeX.
- A short introduction to LaTeX . Also a pdf file.

The free program BBEdit Lite is very helpful in editing text files. Another Macintosh text editor is Alpha, which is more powerful than BBEdit, but more complicated. Alpha is shareware.

If you want your own copy of OzTeX, you can get it from the OzTeX home page. OzTeX is shareware, but Brandeis has a site licence that allows you to use it without paying the shareware fee. If you want to see the OzTeX documentation, you can find it in a file called

`ozuser.dvi`

inside the OzTeX folder.For information about other versions of TeX for the Macintosh, see the Penn State Macintosh TeX/LaTeX web site.

A free version of TeX for Windows is MiKTeX.

For other versions of TeX and other TeX-related software, see TeX Resources on the Web.

If your spelling is less than perfect, you may find it helpful to use a a spell-checker. Excalibur is a spell-checker that's designed to be used with LaTeX files on the Macintosh. It does a very nice job and it's free.

### Maple Links

Here is some online documentation on Maple: