Title : 
A tight bound for black and white pebbles on the pyramid
         
        
        
        
        
        
        
            Abstract : 
Lengauer and Tarjan proved that the number of black and white pebbles needed to pebble the root of a tree is at least 1/2 the number of black pebbles needed to pebble the root. We extend this result to a larger class of acyclic directed graphs including pyramid graphs.
         
        
            Keywords : 
Application software; Computational modeling; Computer languages; Computer science; Laboratories; Optimizing compilers; Program processors;
         
        
        
        
            Conference_Titel : 
Foundations of Computer Science, 1983., 24th Annual Symposium on
         
        
            Conference_Location : 
Tucson, AZ, USA
         
        
        
            Print_ISBN : 
0-8186-0508-1
         
        
        
            DOI : 
10.1109/SFCS.1983.3