Definition 5.3.4: Totally Disconnected
 
A set S is called totally disconnected if for  
each distinct  
x, y  
 S  
there exist disjoint open set U and V such that  
x 
 U,  
y 
 V,  
and  
(U 
 S)  
 (V  
 S) = S. 
 
 
 
   
   
 S  
there exist disjoint open set U and V such that  
x 
 U,  
y 
 V,  
and  
(U 
 S)  
 (V  
 S) = S. 
 
 
            Interactive Real Analysis
             - part of