[Q] error in Integrate

*To*: mathgroup at smc.vnet.net*Subject*: [mg8750] [Q] error in Integrate*From*: Denis Barbier <barbier at cmapx.polytechnique.fr>*Date*: Sat, 20 Sep 1997 22:28:15 -0400*Organization*: Acces regional Ile-de-France (Univ. Paris VI/VII) - France*Sender*: owner-wri-mathgroup at wolfram.com

Hi, with Mma 2.2, Integrate[Integrate[ Sqrt[x-y]^2,{x,0,1}],{y,0,1}] gives 0, which is obviously wrong. Am i missing something ? Is there a package or something else i could load to correct this result ? (theoretical result is 1/3) Thanks in advance. Denis