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Numbers

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REALLY REAL  The mathematical ideal of real numbers might not appropriately represent the reality of the real world, says physicist Nicolas Gisin.

Tropical Storm Harvey

MATH GETS REAL  Chaos theory explains why it’s so difficult to predict weather — a small change in conditions at any point in time can have a large effect on future conditions in, for example, a hurricane’s trajectory (Tropical Storm Harvey shown).

guy writing pi

NOT PIOUS  Pi, the ratio of a circle’s circumference to its diameter, is revered as an all-important number in mathematics. But some are starting to question that devotion.

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