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From: Walter Roberson <roberson@hushmail.com>
Reply-To: Kittithad Wangveerathananon <kittithad@startfromyou.com>
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Subject: Re: suppose I have an equation x^2+x+y^2+3*y=5*y^2+3*y+3*x*y+5 and
 I want to find the set of (x,y) that satisfy the equation.
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Xref: news.mathworks.com comp.soft-sys.matlab:661494

Yeah basically, that what I want. But I need to obtain the value of 
those pairs, because I want to use it to sub into my objective function 
to find that which pair max my objective.

As Steve indicated, there are an infinite number of solution points. 
Exactly how much RAM or disk space do you have to hold all of those 
infinite results, and how long are you prepared to let your minimizer run?