% with the following function non linear constraints can be defined

% the name of the function is nlc_eng (non linear constraints_english)% the function (m-file) must be saved in the current directoryfunction [c,ceq]=nlc_eng(x)% c is the expression of the nonlinear inequality constraints (col vector)% with more then 1 constraints create a new row with ;% if the constraint is not present write c=[]%%c=[];c=[];% ceq is the expression of the nonlinear equality constraints (col vector)% with more then 1 constraint create a new row with ;% if the constraint is not present write ceq=[]ceq=[2*x(2)^2+3*x(1)*x(2)-4];