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Can someone please help me out with what it means when a symbol says "max+-" or "min+-"? I'm assuming that there is no difference between "max+-" and "max", but please correct me if I'm wrong. I've never run across this symbol before.

Here is an image of an equation which has the symbol is question:

Thanks for the help!

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1 Answer

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The best guess I can make is that you have to take the $max$ (in the first equation) over all versions of plus and minus in the $\lambda$s, so $$ \max_\pm\{ \lambda^\pm, \mu^\pm, 0\} $$

is shorthand for $$ \max\{ \lambda^+, \lambda^-, \mu^+, \mu^-, 0\} $$

I checked their papers and they seem to like writing what they're ranging over under the word $max$.

But yeah, it is weird and I've never seen it before.

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