E  
elt [Zdd]  
emc [Tiling]  
M  
multiplicity [Tiling.Tile]  
P  
problem [Tiling]  
S  
solution [Emc] 
a solution is a set of rows

solution [Dlx]  
symetries [Tiling.Tile]  
T  
t [Tiling.Tile]  
t [Tiling.Pattern]  
t [Emc.S.ARITH]  
t [Emc.S]  
t [Dlx] 
The internal data structure for DLX

t [Zdd.ARITH]  
t [Zdd]  
U  
unique [Zdd] 