#format jsmath

== jsMath ==

jsMath itself is working, see:

http://www.server-sky.com/jsmathdir/test/index-images.html

http://www.server-sky.com/jsmathdir/test/index.html

http://www.launchloop.com/jsmathdir/test/index-images.html

http://www.launchloop.com/jsmathdir/test/index.html

MorejsMathTestStuff,   see http://wiki.themel.com/PublicTestPage

Here are some math equations.  Some inline math: $\sqrt{1-x^2}$ or \(ax^2+bx+c\), 
and some displayed math:

$$\int {1\over x}\,dx = \ln(x)+C$$

and

$$ \sum_{i=1}^n i = {n(n+1)\over 2}. $$

Note that some markers do not work, and some do.   You can see the original text and copy what works by looking at this page with More Actions / Raw Text in the moinmoin control panel.

=== Installation notes: ===

jsMath (javascript Math) uses TeX markup and delivers fonts and positioning via javascript.  This means that no client-side fonts or interpretation is needed, such as with MathML.  See  http://www.math.union.edu/~dpvc/jsMath/  .  

jsMath is wrapped in [[ http://wiki.themel.com/jsMathParser | jsMathParser ]] by Thomas Themel, which is a moinmoin plugin installed in the plugin directory ...wikipath.../moin/data/plugin/parser/ .  This file contains a pointer to a sorta-unique instance of jsMath . 

Javascript is finicky for security reasons, and will only run .js files from the same URL as the page was launched from.  www.server-sky.com and server-sky.com are considered two different URLs, so you can't use !ServerAlias in your apache /etc/httpd/conf/httpd.conf file;  instead, you must use redirects (in this case, www.server-sky.com/ and moin.server-sky.com/ both have their own short <Virtual> blocks which redirect to the server-sky.com/ <Virtual> block.  Before pages are rendered, they are redirected to this one common name.

The security restriction also means that each wiki or URL needs its own version of jsMath.  jsMath contains a configuration file .../easy/load.js  (which I put in ...wikipath/jsmathdir/easy/load.js) that has a reference to the URL of the jsMath root directory.
In this case:

 {{{root: "http://server-sky.com/jsmathdir/",}}}

That gets its own redirect clause in httpd.conf, so that the apache server can find the jsmath files.  A complete copy of the entire jsMath (including the font files) are stored in ...wikipath.../jsmathdir/ .  All very complicated and redundant.   The server storage can be reduced by creating symbolic links from all the directories and files in jsmathdir to the common /opt/jsMath, '''except''' for ...wikipath.../jsmathdir/easy/load.js , which must be unique per wiki instance .  This facilitates upgrading jsMath.h