structure, but the resulting structure is not dynamically updatable
in turn, it follows that this technique cannot be applied twice: no
analogous transformation will construct a \e{three}-dimensional
-struccture capable of counting the total weight of an octant
-\cw{\{x\_ <\_x0, y\_<\_y0, z\_<\_z0\}}. I know of no efficient way
+structure capable of counting the total weight of an octant
+\cw{\{x\_<\_x0, y\_<\_y0, z\_<\_z0\}}. I know of no efficient way
to do that.
The structure as described above uses \cw{O(N log N)} storage. Many