Help with aligning math formula and numbering

maxiv · Post by **maxiv** » Mon May 02, 2011 11:43 am

I hope you guys can help me with this.

I have a rather lengthy formula that i would like to type in LyX. Since it stretches over multiple lines i would like to align it beneath the equal-sign of the first line. also i would like to number the formula with (1) and align that number to the very right. A screenshot of what it should look like is attached.

Can you guys please help me and tell me how to make it happen?

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meho_r · Post by **meho_r** » Mon May 02, 2011 1:22 pm

Hi. Try LyX's Math manual (Help > Math), section 18.

maxiv · Post by **maxiv** » Mon May 02, 2011 2:52 pm

Thank you very much, i will try that right now.

I have another question regarding the math:

when i want to preview the document i'm working on and i press the DVI button, the following errors occur:

Display math should end with $$.
Description:

Ebene.\begin{equation}$\log
M_{sdt}=\alpha_{sd}+\beta_{0}\log W_{st}+\...
The `$' that I just saw supposedly matches a previous `$$'.
So I shall assume that you typed `$$' both times.

And the other error:
Missing $ inserted.
Description:

Ebene.\begin{equation}$\log
M_{sdt}=\alpha_{sd}+\beta_{0}\log W_{st}+\...
I've inserted a begin-math/end-math symbol since I think
you left one out. Proceed, with fingers crossed.

But that doesn't really help me..can someone please tell me what I'm doing wrong? I simply used the math editor for my formula and typed the greek letters by using \alpha \beta and so on.

thanks!

meho_r · Post by **meho_r** » Mon May 02, 2011 4:29 pm

Could you create an example .lyx file which shows the issue, put it in a ZIP archive and attach it to your next post, please?

maxiv · Post by **maxiv** » Mon May 02, 2011 4:40 pm

well now i got it to work!

i created the formula and the moment i leave \begin{equation} and \end{equation} away it works. but as soon as i put those commands back the errors comes back.

is there any other way to number the formulas?

also when exporting the file to DVI with MiKTeX Yap, i get the error that not all fonts could be loaded. alpha, beta etc. are then displayed as regular letters a, b and so on.

maxiv · Post by **maxiv** » Mon May 02, 2011 4:58 pm

could it be that I'm simply missing a package for miktex that i have to install with the package installer? there are so many packages, i just don't know which one i should install.

Post by **Stefan Kottwitz** » Mon May 02, 2011 5:31 pm

Hi maxiv,

maxiv wrote:the following errors occur:

Display math should end with $$.
Description:

Ebene.\begin{equation}$\log
...
And the other error:
Missing $ inserted.
Description:

$ is for math in text, don't use it within an equation environment. Just write:

Code: Select all

\begin{equation}
\log ...

Stefan

maxiv · Post by **maxiv** » Mon May 02, 2011 5:34 pm

Stefan_K wrote:Hi maxiv,

maxiv wrote:the following errors occur:

Display math should end with $$.
Description:

Ebene.\begin{equation}$\log
...
And the other error:
Missing $ inserted.
Description:
$ is for math in text, don't use it within an equation environment. Just write:
Code: Select all
\begin{equation}
\log ...
Stefan

thank you, i solved that problem by leaving the {equation} commands out and just clicking the math symbol in LyX. But I still need my equations to be numerized.

And how to i export it to DVI and display it properly? Are there any further packages for MiKTeX I need to install?!

meho_r · Post by **meho_r** » Tue May 03, 2011 4:12 pm

Please, take a look at LyX's Math manual (Help > Math), section 19. Basically, you can get a numbered formula simply by using menus: Insert > Math > Numbered formula (or by pressing Ctrl+Alt+N shortcut). There is no need to enter \begin{equation} manually.

maxiv · Post by **maxiv** » Wed May 04, 2011 9:31 am

meho_r wrote:Please, take a look at LyX's Math manual (Help > Math), section 19. Basically, you can get a numbered formula simply by using menus: Insert > Math > Numbered formula (or by pressing Ctrl+Alt+N shortcut). There is no need to enter \begin{equation} manually.

yes but then i don't have a formula that stretches over multiple lines with all lines subsequent to the first one being aligned to the right. or am i missing something?

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