On Mon, Jun 16, 2008 at 08:17:50AM -0600, Bob Lounsbury wrote:
> On Mon, Jun 16, 2008 at 2:17 AM, Friedrich Hagedorn <[EMAIL PROTECTED]> wrote:
> >
> > how can I add real latex commands in the math mode? I use Lyx 1.5.1 for
> > Linux.
> >
> > E.g. I want to insert a
> >
> >  \intertext{blah blah}
> >
> > before a equation, or add
> >
> >  \\[2em]
> >
> > after a euqation. I tried Ctrl-l and '\' but this didnt work.
>
> A quick google search revealed that \intertext is used in the AMS math
> environment. So you need to enable:
>
> Document->Settings->Math Options->Use AMS math package
>
> Then you should be able to use \intertext in at least the AMS 'align'
> environment. You should probably research how and where this command
> is used. AMS align is found under Insert->Math.
>
> I've attached a few screenshots showing the use of \intertext.

Oh, thanks. Is the "and" in the second screenshot typed with the \intertext
command or are theire two seperate math mode environments?

> I'm not sure why you would need to use \\[2em] in a math environment.
> I show the use of it outside of the math environment.

I know that. And i want to have the same possibility in the math mode.
The \\[2em] was just an example (I need it some times ago in an array
environment to correct the vertical spacing).

I want to insert _arbitrary_ latex commands in the math mode. Otherwise
I must type my equations in a latex-ERT box.

Here is an other example.

\documentclass[a4paper]{scrartcl}
\usepackage{mathpazo}
\usepackage[T1]{fontenc}
\usepackage[utf8x]{inputenc}
\usepackage{amsmath}

\begin{document}

This
\begin{align*}
  f(z) & :=z^{2}\\
  \intertext{with the substitution $z=\sqrt{x^2+y^2}$} & =x^2+y^2
\end{align*}
is important.

\end{document}

How would you input the \intertext command with lyx? I started with

  "\intertext "
  "\{with "

and now I am out of the brackets. An other problem is the local math mode
in $z=...$.

Thanks,

  Friedrich

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