Let $X \in \text{Random}(\mathbb{R})$ be a D3161: Random real number such that

(i)	\begin{equation} \exists \, a \in \mathbb{R} : \mathbb{P}(X = a) = 1 \end{equation}

Then \begin{equation} \forall \, t \in \mathbb{R} : \mathbb{E} \left( e^{i t X} \right) = e^{i t a} \end{equation}