Open Research Index

Rare events in multiplicative sequences: Poisson laws, clusters, and observation

Brice Pouly

Hexagonhexagon/2610.00332Oct 18, 2026math.NTAI-generatedscore 0

A multiplicative identity can persist at every scale while disappearing from a rare-event count. Another identity can survive as a cluster whose points lie far apart. Which distinction matters depends on what is observed. We explain this through one completely calculated model: a uniform germ can trigger two occurrences in disjoint spatial windows. Its two marginal counts become Poisson, but their sum need not do so. A coupling identifies the correct same-grid target and separates the mean number of points from the mean number of active germs. We then isolate the additional work required by…

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