Thomas Little Heath

“ Greek geometer, probably not of Antissa but of Antinoeia or Antinoupolis, a city in Egypt founded by Hadrian, lived, as may be safely inferred from the character and contents of his writings, long after the golden age of Greek geometry, most probably in the 4th century, between Pappus and Theon of Alexandria. ”

“ Heiberg) , shows in Prop. 20 that “it is possible to exhibit a cone and a cylinder cutting one another in one and the same ellipse.” He then solves problems such as—“given a cone (cylinder) and an ellipse on it, to find the cylinder (cone) which is cut in the same ellipse as the cone (cylinder) ” (Props. 21, 22) ; “given a cone (cylinder) to find a cylinder (cone) , and to cut both by one and the same plane so that the sections thus formed shall be similar ellipses” (Props. 23, 24) . In Props. 27, 28 he deals with sub contrary and other similar sections of a scalene cylinder or cone. ”