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I'm not a computer expert, so when I simply include the lines

\include{mathabx, MnSymbol}

in a .tex file, compile it, and it gives me a bunch of errors, I don't know what to do... I'm running MikTeX in Windows.

karlkoeller
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ashpool
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    please be more specific about what errors you see. it might have something to do with fonts not being installed, but it might also indicate conflicts between those two packages. more information is needed. – barbara beeton Jun 06 '13 at 17:55
  • The error says, Command `\ulcorner' already defined. ......lcorner}{\mathopen} {AMSa}{"70}{AMSa}{"70}." I was trying to use the command \lefttorightarrow. – ashpool Jun 06 '13 at 18:02
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    the "already defined" error indicates a conflict between packages. perhaps you don't need all the symbols defined in these two packages. to access symbols selectively, see the question Importing a Single Symbol From a Different Font – barbara beeton Jun 06 '13 at 18:20

1 Answers1

7

First of all, the correct way to load these two packages would be to write these lines in the preamble

\usepackage{mathabx}
\usepackage{MnSymbol}

and not 

\include{mathabx, MnSymbol}

With the latter, LaTeX will try to include the file mathabx,.tex in your main file...

Anyway, these two packages are not compatible because MnSymbol automatically loads the amsmath package which isn't compatible with mathabx.

MnSymbol can be loaded with the option abx if you just need to use the calligraphic font from the mathabx fonts.

Instead, follow the link suggested by Barbara Beeton in her comment if you need to "access symbols selectively", using her words.

karlkoeller
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  • Thanks! I mostly learn by examples, and I thought one could use multiple packages simply by separating them by commas. Why would LaTeX do such a stupid thing as trying to include mathabx,.tex? – ashpool Jun 08 '13 at 12:53
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    Are you sure you did intend to write \include{mathabx, MnSymbol} and not \usepackage{mathabx, MnSymbol} in your question? – karlkoeller Jun 08 '13 at 14:18