I am wondering how to easily refer to the following property of the Lebesgue integral, which holds for any $f\in \mathcal{L}^1(\mathbb{R})$ and any $a\neq 0$: \begin{align*} \int_{\mathbb{R}} f(ax)\, dx=\frac{1}{\vert a \vert }\int_{\mathbb{R}} f(x) \, dx \end{align*}
For instance, I have names for other basic properties of the integral, like "linearity" and "translation invariance".