Haboush completed a Ph.D. in 1969 at Columbia University. His dissertation, A Theory of Codimension One Phenomena with an Application to the Theory of Purely Inseparable Descent, was jointly supervised by Heisuke Hironaka and Raymond Hoobler.[4]
^William Haboush, Directory, University of Illinois Department of Mathematics, retrieved 2024-03-21
^Haboush, W. J. (1975), "Reductive groups are geometrically reductive", Annals of Mathematics, Second Series, 102 (1): 67–83, doi:10.2307/1970974, MR0382294, Zbl0316.14016. See reviews by Vladimir Popov, MR382294, "In this paper the author proves Mumford's famous conjecture on geometrically reductive groups", and by A. G. Elašvili, Zbl0316.14016, "In this paper the Mumford conjecture is proved".