2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/73503We use the results of AG/0406290 to discuss the counting formulas of network flow polytopes and magic squares, i.e. the formula for the corresponding Ehrhart polynomial in terms of residues. We also discuss a description of the big cells using the theory of non broken circuit bases.18 pagesCombinatoricsAlgebraic Geometrytext