Alphabeta Math
DefinitionDefinition: Literature-sourcedProof: Not applicablePipeline-generated
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The scalar Poisson count law

Definition

For a finite parameter λ≥0, the Poisson count law Pois⁡(λ) is the probability measure on N0={0,1,2,…} whose masses are Pois⁡(λ){k}=e−λλkk!,k∈N0, when λ>0, and is the point mass at 0 when λ=0. The normalization and the moment and generating-function identities used below are proved in Normalization, moments, and generating function of the Poisson count law ↗. The separate extended convention for a Poisson point-process count on a Borel set of infinite intensity is that the count equals +∞ almost surely; it is not a finite Poisson probability law.

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