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How do I draw a tilde in math mode?

I need to print $ X_i~N(\mu,\sigma)$ but ~ and \~ don't work in math mode in LaTeX.

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marked as duplicate by Scott H., Claudio Fiandrino, Werner, barbara beeton, Stefan Kottwitz Jan 16 '13 at 18:46

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Welcome to TeX.sx! You're looking for \sim, probably. –  egreg Jan 16 '13 at 17:32
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Try drawing it in detexify. –  lhf Jan 16 '13 at 17:42
    
Karina, have a look at the question linked by Scott and let us know if it doesn't answer your question. If it does, your question will be closed to keep the place tidy. –  Vivi Jan 16 '13 at 18:11
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1 Answer 1

texdoc comprehensive is your friend

$X_i\sim N(\mu,\sigma)$
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