Let $\alpha, \beta \in (0, \infty)$ each be a
D5407: Positive real number such that
| (i) |
$x \mapsto \lfloor x \rfloor$ is the D764: Real-integer floor function
|
| (ii) |
\begin{equation}
N
:= \lfloor \alpha \rfloor
\end{equation}
|
| (iii) |
$T_1, \, \ldots, \, T_N \overset{d}{=} \text{Exponential}(\beta)$ are each an D214: Exponential random positive real number
|
| (iv) |
$A \overset{d}{=} \text{Alpha}(\alpha - N, \beta)$ is an D6332: Alpha random positive real number
|
| (v) |
$A, T_1, \, \ldots, \, T_N$ is an D2713: Independent random collection
|
A
D5722: Random positive real number $X \in \text{Random}(0, \infty)$ is a
gamma random positive real number with parameter $(\alpha, \beta)$ if and only if
\begin{equation}
X
\overset{d}{=} A + \sum_{n = 1}^N T_n
\end{equation}