# Math Help - Leibniz Rule for Directional Derivatives

1. ## Leibniz Rule for Directional Derivatives

Show the following Leibniz Rule for directional derivatives holds.
Given v ∈ T_p(M) we have v[fg]=v[f]g(p)+f(p)v[g]

2. ## Re: Leibniz Rule for Directional Derivatives

$v(fg)=\frac{d}{dt}\bigg\vert_0(fg)(\gamma(t)) = \ldots$