# Sorry about the page errors…

By Murray Bourne, 25 Oct 2005

You've arrived here because the article you were looking for has expired.

Maybe the topic became too old, or I was discussing some link and it's disappeared, or maybe the featured video no longer exists.

Nothing is forever on the Web...

You may find something interesting in these sections of the blog:

Mathematics

Learning mathematics

Learning (general)

Computers and Internet

Math Movies

## Blog sitemap

All of the articles are listed here: Blog sitemap.

Be the first to comment below.

### Comment Preview

HTML: You can use simple tags like <b>, <a href="...">, etc.

To enter math, you can can either:

1. Use simple calculator-like input in the following format (surround your math in backticks, or qq on tablet or phone):
a^2 = sqrt(b^2 + c^2)
(See more on ASCIIMath syntax); or
2. Use simple LaTeX in the following format. Surround your math with $$and$$.
$$\int g dx = \sqrt{\frac{a}{b}}$$
(This is standard simple LaTeX.)

NOTE: You can't mix both types of math entry in your comment.