William Jaco

William H. Jaco
William Jaco at Oberwolfach in 2012
Born (1940-07-14) July 14, 1940
Alma materB.A., Fairmont State College
M.A., Pennsylvania State University
Ph.D (1968) University of Wisconsin-Madison
Known forJSJ decomposition
AwardsGrace B. Kerr Professor
Scientific career
FieldsMathematics, Topology, and Geometry
InstitutionsRice University, Oklahoma State University

William Howard Jaco (born July 14, 1940) is an American mathematician who is known for his role in the Jaco–Shalen–Johannson decomposition theorem and efficient triangulations of 3-manifolds. He retired from Oklahoma State University in 2021 as Regents Professor Emeritus and was appointed adjunct professor at Rice University in 2021.