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## Amsmath errors

amsmathamsthmLyXMiKTeXAdd tags Information and discussion about LyX, a WYSIWYM editor, available for Linux, Windows and Mac OS X systems.

### Amsmath errors

Hi everyone,

I am a complete LaTeX (and computer) noob. This has motived me years ago to start using LyX because I was getting too many errors I couldn't fix in LaTeX. Now, however, I'm having some troubles in Lyx.

A couple of hours ago, LyX stopped working : when I tried pdf'ing my files, it would not respond, forcing me to close it. I reinstalled LyX (now using version 2.0.5) and MikTeX ( version 2.9), and that problem seems to have dissapeared. Instead, amsmath.sty can not be found and Lyx is also complaining about the package 'amssymb'.

I read that I should include '\usepackage{amsmath}' in the LaTeX preambule, but this doesn't work. I also read that amsmath is now included in amslatex, which I've tried adding to the LaTeX preambule, but this isn't working either. Next, I read that you could try and change the article type to article (AMS), but this isn't in the list. I have downloaded packages using MikTeX package manager. Someone mentioned I should click the 'reconfigure' button in LyX, but this didn't work either.

Being a total computer noob, I have no idea what to do anymore. I've tried googling this problem but I can't understand half of what is being said. Can someone please help?
Yoran91

Posts: 3
Joined: Sat Feb 23rd, 2013

### Re: Amsmath errors

Hi,

welcome to the forum!

This could be an issue with the reorganization of amsmath files in a recent MiKTeX update. Have a look at this post.

Stefan

Stefan_K

Posts: 6148
Joined: Mon Mar 10th, 2008
Location: Hamburg, Germany

### Re: Amsmath errors

Yoran91 wrote:Hi everyone,

I am a complete LaTeX (and computer) noob. This has motived me years ago to start using LyX because I was getting too many errors I couldn't fix in LaTeX. Now, however, I'm having some troubles in Lyx.

Learning LaTeX helps with using LyX a lot. In fact, Yihui Xie does not recommend LyX for beginners:

Yihui wrote:Finally, I do not recommend LaTeX novices to try LyX. It is a bad idea in general to use GUI if you do not really understand it.

http://yihui.name/en/2012/10/lyx-vs-latex/
scottkosty

Posts: 141
Joined: Sat Sep 1st, 2012

### Re: Amsmath errors

Ok, I've read the text in your link and I've managed to install the amsmath package. Now, I can pdf empty files or files containing just letters and formulas. Thank you!

However, the file I wish to be able to pdf also contain theorems and lemmas from the ams theorem package, and LyX now can't find the amsthm.sty file. The lyx file does pdf if I remove the theorems and lemmas. As far as I know this file is included in the amslatex package, which I have updated and installed on MikTeX.

Why doesn't it work, then?
Yoran91

Posts: 3
Joined: Sat Feb 23rd, 2013

### Re: Amsmath errors

Yoran91 wrote:Ok, I've read the text in your link and I've managed to install the amsmath package. Now, I can pdf empty files or files containing just letters and formulas. Thank you!

However, the file I wish to be able to pdf also contain theorems and lemmas from the ams theorem package, and LyX now can't find the amsthm.sty file. The lyx file does pdf if I remove the theorems and lemmas. As far as I know this file is included in the amslatex package, which I have updated and installed on MikTeX.

Why doesn't it work, then?

Did you do reconfigure? (LyX > reconfigure I think if Mac), otherwise Tools > Reconfigure.
scottkosty

Posts: 141
Joined: Sat Sep 1st, 2012

### Re: Amsmath errors

You need to install also the `amscls` package, `amsthm` belongs to it.

Stefan

Stefan_K

Posts: 6148
Joined: Mon Mar 10th, 2008
Location: Hamburg, Germany

### Re: Amsmath errors

Awesome, it's working! Thanks!
Yoran91

Posts: 3
Joined: Sat Feb 23rd, 2013

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amsmathamsthmLyXMiKTeX