 The other teams were the Tian–Morgan team (Gang Tian of Princeton University and John Morgan of Columbia University) and the Kleiner–Lott team (Bruce Kleiner of Yale University and John Lott of the University of Michigan).Cao and Xi-Ping Zhu published a paper in the June 2006 issue of the "Asian Journal of Mathematics" with an exposition of the complete proof of the Poincaré and geometrization conjectures.They initially implied the proof was their own achievement based on the "Hamilton-Perelman theory", but later retracted the original version of their paper, and posted a revised version, in which they referred to their work as the more modest "exposition of Hamilton–Perelman's proof".