I have an equation like this,(adsbygoogle = window.adsbygoogle || []).push({});

[itex]\frac{dZ}{zD\beta} = \frac{d}{d\beta}\ln Z[/itex],

is it from [itex]\frac{d}{d\beta}\frac{dZ}{Z}[/itex] or from...?

How we can prove this relation?

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# What's this equation come from?

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