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when toggle format what by license comment
Mar 28, 2021 at 17:14 comment added gunes I don't think there is. Keen eye! They could've used completely another letter by the way, e.g. $m$.
Mar 28, 2021 at 16:50 comment added ballegard Thank you, that makes sense. Is there a reason that they use $l$ in the first equation and $\ell$ in the second equation, though?
Mar 28, 2021 at 15:59 vote accept ballegard
Mar 28, 2021 at 15:51 history answered gunes CC BY-SA 4.0