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I am making a beamer file. While there's nothing in math mode, everything runs perfectly well, however, when sentences like

$P_A\subseteq E_X$

is inserted, it cannot output a .pdf file, but its ok with only $\subseteq$. I don't know what went wrong.

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closed as unclear what you're asking by Joseph Wright Aug 3 at 7:50

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question.If this question can be reworded to fit the rules in the help center, please edit the question.

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Welcome to TeX.SX! You can have a look on our starter guide to familiarize yourself further with our format. In particular, could you construct a complete minimal working example (MWE); start by copying your file, and then strip the copy until you have a minimal file that reproduces the error. Either this process will help you fix it, or you can post the minimal file and hopefully someone here can take a look :) –  cmhughes Feb 13 at 18:50
    
Are you loading the amsmath package? –  Sigur Feb 13 at 19:04
    
A tip: If you indent lines by 4 spaces or enclose words in backticks `, they'll be marked as code, as can be seen in my edit. You can also highlight the code and click the "code" button (with "{}" on it). –  Adam Liter Feb 13 at 19:12
    
@Sigur: no, I didn't. But loading or not makes no difference. –  Kuan Feb 13 at 19:20
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@Kuan: See Fonts in beamer where the suggestion is to rather use usefonttheme[onlymath]{mathserif}. However, I don't know why you are having problems... –  Werner Feb 13 at 20:27

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