ThmDex – An index of mathematical definitions, results, and conjectures.
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Definition D4001
Geometric random positive integer
Formulation 1
Let $X_1, X_2, X_3, \dots \in \text{Bernoulli}(\theta)$ each be a D207: Bernoulli random boolean number such that
(i) $X_1, X_2, X_3, \dots$ is an D2713: Independent random collection
(ii) $\theta \in (0, 1]$
A D5748: Random positive integer $G \in \text{Random} \{ 1, 2, 3, \ldots \}$ is a geometric random positive integer with parameter $\theta$ if and only if \begin{equation} G \overset{d}{=} \min \left\{ N \in \{ 1, 2, 3, \ldots \} : \sum_{n = 1}^N X_n = 1 \right\} \end{equation}
Also known as
Geometric random variable
Children
▶ D5116: Cogeometric random natural number
▶ D4000: Standard exponential random positive real number
Results
▶ R4997
▶ R4996
▶ R4805: Dual probability distribution function for geometric random positive integer
▶ R4998: Limit of distribution function of geometric random positive integer scaled by reciprocal of index
▶ R4804: Probability distribution function for geometric random positive integer
▶ R3205: Probability mass function for geometric random positive integer