 The article mentioned how Cao and Zhu had copied from Kleiner and Lott and reported that Cao and Zhu "grudgingly printed an erratum acknowledging Kleiner and Lott's priority".The article also quoted Yau as saying of the Poincaré conjecture, "The methods developed … should shed light on many natural systems, such as the Navier-Stokes equation [of fluid dynamics] and the Einstein equation [of general relativity].