  We have studied the microstructure of a system of interacting Bose particles
under zero boundary conditions and have found two possible orderings. One
ordering is traditional and is characterized by the Bogolyubov dispersion law
E^2 = (h^2 k^2/2m)^{2} + qn\nu(k)[h^2 k^2/m] (with q=1) at a weak interaction.
The second one is new and is characterized by the same dispersion law, but with
q=2^{-f}, where $f$ is the number of noncyclic coordinates. At a weak
interaction, the ground-state energy is less for the new solution. The
boundaries affect the bulk microstructure due to the difference of the
topologies of closed and open systems.
