2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/216683For an unmixed bipartite graph $G$ we consider the lattice of vertex covers $\mathcal{L}_G$ and compute depth, projective dimension and extremal Betti-numbers of $R/I(G)$ in terms of this lattice.8 pages, 1 figureCommutative AlgebraCombinatorics13D02, 13P10, 13D40, 13A02text