# Writing mathematics and notation in posts

5 views

### Rob Beezer

Mar 3, 2009, 10:41:16 PM3/3/09
to fcla-discuss
group. I'd suggest we borrow from TeX and with a few conventions I
think we can all get our points across. jsMath works well for
displaying math in web pages, and there are some forums that I have
integrated it, but I don't see an easy way to make this happen here in
Goggle Groups. Here are some suggestions

Subscripts: x_2 (x sub 2)
Superscripts: x^2 (x-squared)

Sets: {v_1, v_2, v_3}, or S, T,...
Spans: <T>

Matrices: A, B, C,...
Scalars: a, b, c,...
Vectors: u, v, w, ...
Augmented matrix: [A|b]

Along with careful spacing, it should be possible to be
understandable. If you have something to contribute to the book,
writing in full-on TeX (using \$'s, etc) would be helpful when I
include it, and should be readable here as well.

Rob

### Valerón

Mar 4, 2009, 1:41:30 AM3/4/09
to fcla-discuss
We still need set & object relation notations.

Valerón

### Valerón

Mar 4, 2009, 1:43:54 AM3/4/09
to fcla-discuss
A quite important problem, that seems I can't edit my own post...

On Mar 4, 11:41 am, Rob Beezer <goo...@beezer.cotse.net> wrote:

### Rob Beezer

Mar 5, 2009, 11:21:02 PM3/5/09
to fcla-discuss
No, I don't think that going back to edit is an option. Just correct
yourself as you go. ;-)

\in is TeX for set inclusion, so x \in X denotes x as an element of
X.

\subset or \subseteq should be obvious, except the second includes
equality as a possibility while the first is strict.

<=, etc are similar.

A-bar might work for conjugates if there aren't too many.

|A| for determinant, ||v|| for norm

What else am I forgetting?

Rob