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Philippe De La HirePhilippe de la Hire (or Lahire or Phillipe de La Hire), French mathematician and astronomer, was born in Paris on March 18, 1640, and died there on April 21, 1719. He wrote on graphical methods, 1673; on the conic sections, 1685; a treatise on epicycloids, 1694; one on roulettes, 1702; and, lastly, another on conchoids, 1708. His works on conic sections and epicycloids were founded on the teaching of Desargues, whose favourite pupil he was. He also translated the essay of Moschopulus on magic squares, and collected many of the theorems on them which were previously known; this was published in 1705. He also published a set of astronomical tables in 1702. This text incorporates public domain material from Rouse History of Mathematics Hire, Philippe de la Hire, Philippe de la
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