 After the similarity with the argument by Kleiner and Lott had been pointed out, Cao and Zhu published an erratum that appeared in the November 2006 issue of the "Asian Journal of Mathematics", confirming that the material was by Kleiner and Lott, stating that its uncredited appearance in the Cao–Zhu paper was due to an oversight, and apologizing for failing to properly attribute the copied argument.In the same issue, the "AJM" editorial board issued an apology for what it called "incautions" in the Cao–Zhu paper.On December 3, 2006, Cao and Zhu retracted the original version of their paper, which was titled “A Complete Proof of the Poincaré and Geometrization Conjectures — Application of the Hamilton–Perelman Theory of the Ricci Flow” and posted a revised version, renamed, more modestly, "Hamilton–Perelman's Proof of the Poincaré Conjecture and the Geometrization Conjecture".