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

1. Sep 25, 2010

### logarithmic

I have a definition of the Lie derivative, that is the one found here: http://planetmath.org/encyclopedia/LieDerivative2.html [Broken]

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

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

Can someone explain.

Last edited by a moderator: May 4, 2017
2. Sep 26, 2010