Correction to orig message

*To*: mathgroup at smc.vnet.net*Subject*: [mg8755] Correction to orig message*From*: "Sherman.Reed" <sherman.reed at worldnet.att.net>*Date*: Sat, 20 Sep 1997 22:28:20 -0400*Sender*: owner-wri-mathgroup at wolfram.com

Giles, Plot3D somehow came out as plotted. Sorry Sherman > ---------- > > From: Sherman.Reed <sherman.reed at worldnet.att.net> > > Subject: [mg8755] Re: [mg8711] False result with Integrate ? > > Date: Friday, September 19, 1997 2:12 PM > > > > Giles, > > > > First plot the function using plotted. I assume you want to calculate > > the area from the xy plane to the curve. > > > > Second, consider the following integral > > > > Integrate[Integrate[x,{x,y,1}],{y,0,1}], which when evaluated in 2.2, > 3.0, > > 2.2.3 > > gives the exact result of 1/3 > > > > Sherman C. Reed > > sherman.reed at worldnet.att.net > > > > > > ---------- > > > From: Gilles BARBIER <Gilles.Barbier at der.edfgdf.fr> To: mathgroup at smc.vnet.net > > > To: mathgroup at smc.vnet.net > > > Subject: [mg8755] [mg8711] False result with Integrate ? > > > Date: Friday, September 19, 1997 1:47 AM > > > > > > > > > Help ! > > > > > > Why : Integrate[Integrate[ Sqrt[(x-y)^2],{x,0,1}],{y,0,1}] > > > gives 0 with math2.2 or math3.0. > > > > > > The exact result is 1/3 !! > > > > > > Gilles > > > EDF/DER