Template:Selected anniversaries/December 18

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  1889: Set theorist and crime-fighter Georg Cantor uses Gnomon algorithm to advance Set theory research.

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  1965: Antikythera Team invents new class of Gnomon algorithm.

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  1976: Cube delivers lecture on geometry.

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  2002: HAL 9000 blames "inherent faults of set theory" for death of crew and passengers.