This scientist's eponymous algorithm subtracts multiples of one of its inputs from the other to find greatest common factors.
This scientist's eponymous algorithm subtracts multiples of one of its inputs from the other to find greatest common factors. He also lends his name to systems in which given a line and a point not on it, there is exactly one line (*) parallel to the given line through the given point. Name this ancient Greek who started from five axioms and five postulates, including the parallel postulate, in his set of thirteen books about geometry, The Elements.
This scientist's eponymous algorithm subtracts multiples of one of its inputs from the other to find greatest common factors.
{Euclid} of Alexandria [or {Eukleides}]