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Aristaeus the Elder (Ancient Greek:Ἀρισταῖος ὁ Πρεσβύτερος; 370 – 300 BC) was aGreekmathematician who worked onconic sections. He was a contemporary ofEuclid.
Only little is known of his life. The mathematicianPappus of Alexandria refers to him as Aristaeus the Elder. Pappus gave Aristaeus great credit for a work entitledFive Books concerning Solid Loci which was used by Pappus but has been lost. He may have also authored the bookConcerning the Comparison of Five Regular Solids. This book has also been lost; it is known through a reference by the Greek mathematicianHypsicles.
Heath 1921 notes, "Hypsicles (who lived in Alexandria) says also that Aristaeus, in a work entitledComparison of the five figures, proved that the same circle circumscribes both the pentagon of the dodecahedron and the triangle of the icosahedron inscribed in the same sphere; whether this Aristaeus is the same as the Aristaeus of the Solid Loci, the elder contemporary of Euclid, we do not know."[1]