Re: Integral problem

*To*: mathgroup at smc.vnet.net*Subject*: [mg58314] Re: Integral problem*From*: dh <dh at metrohm.ch>*Date*: Tue, 28 Jun 2005 05:13:13 -0400 (EDT)*References*: <d9num6$cl5$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Hi Huafung, why are you trying to evaluate an integral symbollically if you want numerical values? Use "NIntegrate" instead of "Integrate", this will do the job pretty fast. sincerely, Daniel HUAFANG CUI wrote: > Hi, > > I have a question about integral. I could not figure out what is wrong. > > function is > 0.5 * (1 + 10^7 * ((1-x-y)/1.5 + x/8)^10) + 0.004 * x / ((1-x-y)/1.5 + > x/8)^10) > > limit on y is > 0.8425 - x, 0.8 > > limit on x is > 0.0425, 0.1999 > > I run it on Ver4.0. It runs forever and does not stop. > > Thank you. > > HC >