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How can I make the exponent on gamma in this picture? The best description I can come up with is a closed degree symbol.

gamma

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$\gamma^\bullet$

Have a look at “How to look up a math symbol?” for ideas how you can easily find a particular symbol.

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Thanks Caramdir--you never fail to impress me with your speed and consistency. also, that link was helpful for another thing I didn't know ($\trianglelefteq$) – pgaf Mar 6 '11 at 16:13

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