Task: Text Categorization
Input (English): Isidore of Miletus wrote an apocryphal addition to one work of this man. His Phaenomena was of use to astronomers and he countered Aristotelean thought in his Optics. He is the namesake of a proof of the unbounded number of primes and an algorithm for computing GCD. His most read work is a textbook consisting of thirteen books ranging in subject from number theory to three dimensional solids. That work is the source of (*) five particular postulates. For 10 points, name this Alexandrian author of the Elements and namesake of the traditional type of geometry.
Output (English): Social Science