వాడుకరి మార్గదర్శక పుస్తకం

17
 

 
❚❚ 

 


    J    
 .
2 :   
  -

4 :   
  
1 :    
3 :    
J :  
 
A d () 
       d  , L (U)
     .
       
.      1  3 
.
L ( U ) 