Roger Horn

Roger Alan Horn, born on 19 January 1942, is an American mathematician who specializes in matrix analysis. He was research professor of mathematics at the University of Utah. He is known for formulating the Bateman-Horn conjecture with Paul T. Bateman, a statement about the density of prime number values generated by systems of polynomials, and for his books Matrix Analysis and Topics in Matrix Analysis, written with Charles R. Johnson, which are standard texts in advanced linear algebra. He graduated from Cornell University in 1963 and completed his PhD at Stanford University in 1967. He founded and chaired the Department of Mathematical Sciences at Johns Hopkins University from 1972 to 1979 and edited The American Mathematical Monthly from 1997 to 2001.