2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/141475We investigate the poset of strata of a Schubert-like stratification of certain natural compactification of the space of hermitian $n\times n$ matrices. We prove that this poset is a modular ortholattice, we compute its Möbius function and we describe the topology of its order intervals.19 pages, 4 figuresCombinatoricsGeometric Topology05E99, 06A07,06C99, 55U10, 57R50text