* NLP literature problem
* Adjiman et al., 1998.


VARIABLES
	 x1  
	 x2  
     objval    objective function variable;

FREE VARIABLES    objval;


EQUATIONS
	 f Objective function;

f  .. objval =e=COS(x1)*SIN(x2)-x1/(POWER(x2,2)+1);

* Bounds
x1.LO = -1; x1.UP = 2;
x2.LO = -1; x2.UP = 1;

MODEL test /ALL/;
SOLVE test USING NLP MINIMIZING objval;