Robert Sorgenfrey

Robert Henry Sorgenfrey (August 14, 1915 – January 7, 1996) was an American mathematician and Professor Emeritus of Mathematics at the University of California, Los Angeles.^[4] The Sorgenfrey line and the Sorgenfrey plane are named after him; the Sorgenfrey line was the first example of a normal topological space whose product with itself is not normal.

Robert Sorgenfrey
Born	(1915-08-14)August 14, 1915[1] Sunbury, Iowa
Died	January 7, 1996(1996-01-07) (aged 80)[2] Los Angeles, California
Nationality	American
Alma mater	University of Texas at Austin[3]
Scientific career
Fields	general topology
Institutions	University of California, Los Angeles
Thesis	Concerning Triodic Continua  (1941)
Doctoral advisor	R.L. Moore