Why doesn't noparse work with cases environment in LaTeX?

[topsquark]

I have a question about how to use "noparse." I stole the code from one of MarkFL's recent posts. Here's what I am trying to do, but it's not supposed to carry out the line commands. I don't know why it isn't working.

$$f(x)=\begin{cases}1 & x\in\mathbb{Q}\\ 0 & x\notin\mathbb{Q} \\ \end{cases}$$

-Dan

 

[MarkFL]

Re: noparse

I actually tried to use the noparse tags in that post, but ran into the same problem, so being pressed for time, I simply went with the code tags.

 

[Jameson]

Re: noparse

I have a question about how to use "noparse." I stole the code from one of MarkFL's recent posts. Here's what I am trying to do, but it's not supposed to carry out the line commands. I don't know why it isn't working.

$$f(x)=\begin{cases}1 & x\in\mathbb{Q}\\ 0 & x\notin\mathbb{Q} \\ \end{cases}$$

-Dan

This is strange. The noparse tag actually works as you can see here:
$$x^2$$

For some reason though this code on its own with no dollar signs renders Latex. I have no idea why.

\begin{cases}1 & x\in\mathbb{Q}\\ 0 & x\notin\mathbb{Q} \\ \end{cases}

 

[I like Serena]

Re: noparse

vBulletin always executes the begin{cases} latex environment directive, regardless what's around it.
You don't even need [tex] markers to make it work.

 

[topsquark]

Thanks all. (Bow)

-Dan