 
 
 
 
 
 
 
  
 of
 of  variables
 variables
 , called the optimum function 
 and 
assume that you are looking for the global minimal or maximal
 value of
, called the optimum function 
 and 
assume that you are looking for the global minimal or maximal
 value of  when the
unknowns lie in some ranges. 
Furthermore the unknowns may be submitted to
 when the
unknowns lie in some ranges. 
Furthermore the unknowns may be submitted to  constraints
of type
 constraints
of type  ,
,  constraints of type
 constraints of type
 and
 and  constraints of type
 constraints of type  . 
Note that
. 
Note that 
 may have interval
coefficients.
 may have interval
coefficients.