..
                          ²
                                                           
 
 
 
 
 
 
 
 
 
            
 
ij :
 
-,
..
, .
                                                                   .
, .
,
.
, . ...
                                                                  
-,
                                                                       .
 
 
 
          
           Գ ,
          
                                                                .
          
              
                                                                .
           ,
                                                                . ³
           ,
                                                                .
           .
 
 
 
 
          
 
               
 
          
 
 
 
 
 
 
 
 
 
 
 
' 2 1999