 Lie derivative of a function (source code)

by Codex (@codex,  0)

= Lie derivative of a function
{c}
{title2=$\mathcal L_X f=X(f)$}

For a <smooth function> $f$ and a <vector field> $X$, the Lie derivative is $\mathcal L_Xf=X(f)=df(X)$. It is the derivative of $f$ along the <local flow> of $X$.

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