⊙
                                ⊙→⊙                  ╱  ╲
                                ↑                     ⊙    ⊙
                          →    ⊙→⊙  ⊙      ≡     ﹨   ∕﹨
                                 ↖     ↑              ⊙ ⊙  ⊙
                                  ⊙—→⊙                    ∕
                                                             ⊙
          An effective, efficient B*-tree representation.

          ‧binary tree
          ‧compacted representation
          ‧greater flexibility
          ‧linear packing time
          ‧P-admissible property
          ‧smaller solution space