function z=power(x,y),z=x^y,endfunction
function z=root(x,y),z=y^(1/x),endfunction
function z=gt(x,y),z=x-y,endfunction
function z=lt(x,y),z=y-x,endfunction

function xdot=f(t,x)




xdot=[];


	
endfunction
        x0=[];

t=linspace(0,90);
%ODEOPTIONS=[1,0,0,%inf,0,2,2000,12,5,0,-1,-1];
x=ode(x0,0,t,f);
        
//this@is@a@test
plot(t',x')
legends([],[])

//real_variable: