# Guess the song and artist (2)

$$\lfloor \nabla_{\mu} X_{\nu} + \nabla_{\nu} X_{\mu}\rfloor = 0$$

Hint1: Also a video game.

## 1 Answer

Is it

Killing Floor by Howlin Wolf?

$\nabla_{\mu} X_{\nu} + \nabla_{\nu} X_{\mu} = 0$ is the "Killing equation", and $\lfloor x \rfloor$ is the floor function

• that was quick! (Not quite as cryptic as the first question, but just for fun!) - link between the two questions was going to be the next hint :) – martin Dec 11 '15 at 17:35
• @martin I think I managed to catch this while it was up earlier today, started trying to figure it out then. – question_asker Dec 11 '15 at 17:37
• early start! ... Hendrix did a cover of course ;) – martin Dec 11 '15 at 17:40