Dear Sergiu, The image I sent made the message to large. If you would like to see the rendering I would be glad to send it to you. Simply put, the code you supplied still doesn't work even though I copied and pasted your code directly into my wiki 2.0 page. greetings, Steven Calkins E-Mail: steven.calkins(at)crossmediasolutions.de

-----Ursprüngliche Nachricht----- Von: Steven Calkins Gesendet: Montag, 16. November 2009 10:50 An: 'XWiki Users' Betreff: AW: [xwiki-users] Latex {cases} command doesn't work in default xwiki 2.0 formula macro

Hi Sergiu,

I tried your example after changing the line "macro.formula.renderer" in the properties file back to "native"and restarting xwiki. Sadly it still didn't work on my machine. So what is different on your machine compared to mine? (Do you perhaps have a developing environment which automatically finds the proper TeX parts?) I just copied and pasted your example. The rendered results are seen in the attached screenshot. I'm not sure that attachments get through to you, but if you can view it, you can see that the formulae are rendered, just the cases command is not executed. I'm still using a SKIN from 1.9. on XWiki Enterprise 2.0.3.24848, running on postgres but I believe that should be irrelevant. Here's my code:

================START XWIKI CODE ==================================

=== Continuation and cases=== This example from wikipedia doesn't seem to work: {{formula fontSize="normal"}} f(x) = \begin{cases}1 & \mbox{-1 \le x < 0\par} \\ \frac{1}{2} & \mbox{x = 0} \\ 1 - x^2 & \mbox{otherwise\par}\end{cases} {{/formula}}

Example from Sergiu {{formula}} f(x) = \begin{cases} 1 & -1 \le x \le 0 \\ \frac{1}{2} & x = 0 \\ 1 - x^2 & \mbox{otherwise} \end{cases} {{/formula}}

Case definitions

Used when a definition has two or more cases. Use the case statement. Notice that the spaces after the instances of if were included inside the mbox declarations.

{{formula fontSize="normal"}}f(n) = \begin{cases} n/2, & \mbox{if } n\mbox{ is even} \\ 3n+1, & \mbox{if } n\mbox{ is odd} \end{cases}{{/formula}}

Third try {{formula fontSize="normal"}}f(n) = \left\{ \begin{array}{l l} n/2 & \quad \text{if $n$ is even}\\ -(n+1)/2 & \quad \text{if $n$ is odd}\\ \end{array} \right.{{/formula}}

======================END XWIKI CODE==================

Cheers,

Steven Calkins E-Mail: steven.calkins(at)crossmediasolutions.de (in the event you want to see my image and can't)

-----Ursprüngliche Nachricht----- Von: [email protected] [mailto:[email protected]] Im Auftrag von Sergiu Dumitriu Gesendet: Freitag, 13. November 2009 19:16 An: XWiki Users Betreff: Re: [xwiki-users] Latex {cases} command doesn't work in default xwiki 2.0 formula macro

On 11/13/2009 02:56 PM, Steven Calkins wrote:

...

Hi Sergiu,

I tried what you said, adding the line "macro.formula.renderer = native" to WEB-INF/xwiki.properties and saving it. Then I restarted Xwiki but it didn't work. It still rendered the formula in a single line. Then I tried "the line "macro.formula.renderer=mathtran", saved it, and restarted xwiki. It still didn't work. Is there some part of the the TeX package still missing? I just installed XWiki Enterprise 2.0.3.24848, it runs on postgres.

OK, it seems that the default renderer is the native one, so there was no need to change it.

I tried your example, and actually there's a problem with the formula. The code from your mail causes the native renderer to fail because there's a syntax error, specifically the first mbox contains \le, which is only valid in math mode. This works fine:

{{formula}} f(x) = \begin{cases} 1 & -1 \le x \le 0 \\ \frac{1}{2} & x = 0 \\ 1 - x^2 & \mbox{otherwise} \end{cases} {{/formula}}

...

I was a little surprised that I had to add a line in the WEB-INF/xwiki.properties file and not uncomment a line and change its value, as you do in most cases. Could it be that I have an older config file or is the line in WEB-INF/xwiki.properties not available yet in the newest version? I used the config from the download, and changed only those values that pertained to my earlier system settings.

My fault, I forgot to add this setting in the template that generates xwiki.cfg.

...

Greetings,

Steven Calkins

-----Ursprüngliche Nachricht----- Von: [email protected] [mailto:[email protected]] Im Auftrag von Sergiu Dumitriu Gesendet: Freitag, 13. November 2009 12:31 An: XWiki Users Betreff: Re: [xwiki-users] Latex {cases} command doesn't work in default xwiki 2.0 formula macro

On 11/13/2009 11:45 AM, Steven Calkins wrote:

...

Dear all,

The LaTeX {case} macro doesn't seem to work in Xwiki 2.0 with the default LaTeX renderer.

Try these two examples to reproduce it and compare with http://en.wikipedia.org/wiki/Math_markup#Examples_2: [XWIKI CODE STARTS HERE]

=== Continuation and cases=== This example from wikipedia doesn't seem to work: {{formula fontSize="normal"}}f(x) = \begin{cases}1& \mbox{-1 \le x< 0\par} \\ \frac{1}{2} \;\;\;& \mbox{x = 0\par} \\ 1 - x^2& \mbox{otherwise\par}\end{cases}{{/formula}}

===Case definitions===

{{formula fontSize="normal"}}f(n) = \begin{cases} n/2,& \mbox{if } n\mbox{ is even} \\ 3n+1,& \mbox{if } n\mbox{ is odd} \end{cases}{{/formula}}

[XWIKI CODE ENDS HERE]

Any suggestions?

The cases environment is not standard TeX, it belongs to the amsmath package. This means that it is not supposed to work using the default backend. It should work with the native one, which uses the amsmath package, and you could try using the mathtran one. If you decide to change the backend, you'll find instructions in the last paragraph on

http://code.xwiki.org/xwiki/bin/view/Macros/FormulaMacro#HTechnicalinf

...

ormation

-- Sergiu Dumitriu http://purl.org/net/sergiu/ _______________________________________________ users mailing list [email protected] http://lists.xwiki.org/mailman/listinfo/users