Re: Non linear System of inequalities

*To*: mathgroup at smc.vnet.net*Subject*: [mg57320] Re: Non linear System of inequalities*From*: dh <dh at metrohm.ch>*Date*: Tue, 24 May 2005 05:12:58 -0400 (EDT)*References*: <d6mmq1$gi5$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Hi, If I understood your question, then "Reduce" is what you are locking for. E.g.: eq = {x y <= z < 2 x y, y z <= x < 2 y z, z x <= y < 2 z x}; Reduce[eq,{x,y,z}] gives you several possible solutions, one of which is: 1/2<x<1/Sqrt[2] 1/2<y<=x x/(2 y)<z< 2 x y Sincerely, Daniel Huber azzam_maraee at hotmail.com wrote: > I need a help at solving Non linear System of inequalities in tree > variabels or more for example: > xy<=r<=2xy > xz<=r<=2xz > yz<=r<=2yz > and so on... > my Non linear System of inequalities represent the constraints at at > some problem which I search (consistency of a model). > > is there any material or sites which may help me? > I will apreciate any help. >