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Dicaearchus (also correct in English Dicearchos, Dicearchus or DikŠarchus) (Greek Dixaiarxos) (circa 350 BC - circa 285 BC) was a Greek philosopher, cartographer, geographer, mathematician and author.
He was born in Messine (also Messana, Messene; present-day Messina).
Dicaearchus was Aristotle's student in Lyceum. His work is almost lost. He made geometric constructions of a hyperbola and a parabola and worked mainly in the field of cartography, where he was among the first to use geographical coordinates.
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