August Ferdinand Möbius
August Ferdinand Möbius (17th November 1790 - 26th Sepember 1868) was a German astronomer and mathematician, who taught at the University of Leipzig. He wrote several articles on geometry and astronomy. He introduced concepts such as homogeneous coordinates, or that of Duality in Projective Geometry. He is also seen as one of the fathers of topology, in which his most famous creation is the Möbius strip.