ThmDex – An index of mathematical definitions, results, and conjectures.
Convention N568 on D2888: Radon-Nikodym derivative
Notation for a Radon-Nikodym derivative
If $\mu, \nu : M \to [0, \infty]$ are each an D85: Unsigned basic measure and $f : M \to [0, \infty]$ is a D2888: Radon-Nikodym derivative of $\mu$ with respect to $\nu$, then we may denote $f$ by $\frac{d \mu}{d \nu}$.