On the LaTeX wikibooks I saw that there is an easy way to make theorems: http://en.wikibooks.org/wiki/LaTeX/Theorems

The problem is that \usepackage{amsthm} doesn't work - asmthm.sty is not found. And scanning the MiKTeX Package Manager, surely, I didn't find it either. How is it possible to obtain the amsthm.sty and thereafter installing it. So far I've been lucky enough to have the Package Manager doing all the fuss automatically for me.

  • I don't use MikTeX, but it's probably bundled with amsmath or some more general package with ams in the name, perhaps ams-latex.
    – Ryan Reich
    May 6, 2013 at 22:13
  • 4
    Welcome to TeX.sx! You probably have been bitten by the same problem exposed in this question: tex.stackexchange.com/questions/96778
    – egreg
    May 6, 2013 at 22:14
  • Thank you! Though not the exact same problem, the thread helped me a lot :)
    – LaTeXNewB
    May 6, 2013 at 22:30

1 Answer 1


The file amsthm.sty is part of MiKTeX's amscls package. Using the MiKTeX Package Manager, you should install amscls. You will probably want to install the amsmath package as well, for any mathematical typesetting.

In general, you can find out which MiKTeX package any file is in, by typing the full file name (such as in this case amsthm.sty) into the box at the top of the package manager labelled File name: and then clicking the Filter button.

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