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Does anyone happen to know how to typeset the special L character found, for example, in eq. 2.41 in this paper: http://arxiv.org/pdf/1107.5792v2.pdf that is being used for the Lie derivative? Thanks for the help!

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It seems to be the pound symbol: try \mathsterling. By the way, there is a website which can help you with this type of questions: detexify.kirelabs.org. And Welcome to TeX.sx! –  Corentin Mar 15 '13 at 19:31
    
@Corentin Thanks for the tip and the welcome! –  joshphysics Mar 15 '13 at 19:51
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2 Answers

up vote 5 down vote accepted

Sadly I think this is probably the sign for GBP (Great British Pounds) which is achieved with \pounds.

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In fact you can go to arxiv.org/format/1107.5792 and download the TeX source file for their document. There you'll find the command \newcommand\Lie{\pounds}. –  Jay Taylor Mar 15 '13 at 19:33
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there's nothing sad about the Great British Pound! :) –  cmhughes Mar 15 '13 at 19:50
    
Oh wow that's actually hilarious; I didn't notice that. Thanks for the tip about TeX source also btw! –  joshphysics Mar 15 '13 at 19:51
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No, it's only sad to see it abused and out of context! ;) No worries. It's something good to keep in mind for the next time you upload a paper to the arXiv! –  Jay Taylor Mar 15 '13 at 20:21
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Do you mean the pound sterling sign (£)? You could just use the unicode character: £. I think it might even be on any keyboard with some Alt+key or Strg+key combination. On my mac it is Alt+Shift+4, just where the $ is.

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