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Confused about dot product step while deriving the Liouville equation

Thread starter oristo42
Start date Oct 20, 2017
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Confused deriving Dot Dot product Product

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oristo42

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Oct 20, 2017

#1

So, while textbook was deriving Liouville eq, this is one of step the book uses. I don't understand this step at all. Why is this step true?

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jedishrfu

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Oct 20, 2017

#2

I think its the product rule for the del operator:

The power of the del notation is shown by the following product rule:

$6890a5ba5695e2dd567190fa3f5288abf756cc5d$

https://en.wikipedia.org/wiki/Del

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