Hi all,

I've set up the TeX filter and am trying to use the expression on http://demo.moodle.org/mod/resource/view.php?id=11

ie.

\Bigsum_{i=\1}^{n-\1}\frac1{\Del~x}\Bigint_{x_i}^{x_{i+\1}}\{\frac1{\Del~x}\big[(x_{i+1}-x)y_i^{5$\star}\big]-f(x)\}^\2dx

However when I use texdebug it comes out like this:

It is missing the large integral symbol and sum symbol. Is there some additional configuration I need to add to the TeX preamble to get those symbols to work?

Thanks

Ashley

### Bigint_ and Bigsum_

Number of replies: 5### Re: Bigint

Works ok on my test server and PC without any additional configuration. Do you have any other filters on? Is your moodle using some custom tex files or files of moodle?

$$ \Bigsum_{i=\1}^{n-\1}\frac1{\Del~x}\Bigint_{x_i}^{x_{i+\1}}\{\frac1{\Del~x}\big[(x_{i+1}-x)y_i^{5$\star}\big]-f(x)\}^\2dx $$

### Re: Bigint

I'm using a plain install and have had that error on several servers, all running CentOS. The docs pages all have examples for Debian, so maybe it's a packaging problem? I can't find Bigsum and Bigint in the TeX documentation though

### Re: Bigint

hmm, are u sure there is a \Bigint in LaTeX (TeX) ?

Normal \sum works perfectly fine, using \Bigsum gives:

Normal \sum works perfectly fine, using \Bigsum gives:

! Undefined control sequence. l.8 $ \biggl[\Bigsum _i a_i\Bigl\lvert\sum_j x

### Re: Bigint

MimeTeX binary is included to all current versions of moodle and MimeTeX has both Bigint and Bigsum... you could check that you have all core files of folder filter/tex installed and moodle can read and execute mimetex.

### Re: Bigint_ and Bigsum_

I am having exactly the same problem!

Werner

Werner