I have a definition of the Lie derivative, that is the one found here: http://planetmath.org/encyclopedia/LieDerivative2.html [Broken](adsbygoogle = window.adsbygoogle || []).push({});

However, I'm not sure what the notation [tex]Y_{\theta_t(p)}[/tex] used in that article means.

Y is a vector field and [tex]\theta_t(p)[/tex] is a function. Does it mean evaluate Y at \theta_t(p)}[/tex]?

Can someone explain.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Question on the notaion used to define Lie Derviative

**Physics Forums | Science Articles, Homework Help, Discussion**