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ArrLattice    --    lattice of an arrangement of hyperplanes


Syntax 
ArrLattice(A: LIST): LIST of LIST

Description
This function returns the list of relations of the lattice from the list A of hyperplanes in the arrangement.

Example 
/**/ use QQ[x,y];	
/**/ A := [x, x-y, y];
/**/ ArrLattice(A);
[[1,  2],  [1,  3],  [1,  4],  [2,  5],  [3,  5],  [4,  5]]

See Also