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I would like to show a tilde in the superscript of a letter. For example

F^{\tilde{}}

But it does not look good. Any suggestions?

Thanks and regards!

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up vote 9 down vote accepted

I assume you want something that looks like F~, and that you're just using the tilde as a "squiggle" to name something. If you're in math mode, F^{\sim} looks more like what you want.

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The "~" rendering depends on the font, some have centre base, some are positioned much higher (more like "^" and less like "-") Play around with different fonts to get a wanted non-ugly "~".

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