Aristaeus the Elder
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Aristaeus the Elder (active 370 BC-300 BC) was a Greek mathematician who worked on conic sections. He was a contemporary of Euclid, though probably older. Practically nothing of his life is known except that the mathematician Pappus of Alexandria refers to him as Aristaeus the Elder which presumably means that Pappus was aware of another later mathematician also named Aristaeus. Pappus gave Aristaeus great credit for a work entitled Five Books concerning Solid Loci which was used by Pappus but has been lost. He may have also authored the book Concerning the Comparison of Five Regular Solids. This book has also been lost; we know of it through a reference by the Greek mathematician Hypsicles.
- O'Connor, John J.; Robertson, Edmund F., "Aristaeus the Elder", MacTutor History of Mathematics archive, University of St Andrews.
Further reading 
- Vogel, Kurt (1970). "Aristaeus". Dictionary of Scientific Biography 1. New York: Charles Scribner's Sons. pp. 245–246. ISBN 0-684-10114-9.