2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/28486It has been shown that effective lowering of dimension underlies ground-state space structure and properties of two-dimensional lattice systems with a long-range interparticle repulsion. On the basis of this fact a rigorous general procedure has been developed to describe the ground state of the systems.4 pages, LaTeX 2.09, 1 figure in external PostScript file. To appear in Phys.Rev B Rapid CommunicationsStrongly Correlated Electronstext