2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/157028We will use the combinatorics of the $G$-stable pieces to describe the closure relation of the partition of partial flag varieties in \cite[section 4]{L3}.10 pages. Final versionRepresentation Theory14M15, 20G40$G$-stable pieces and partial flag varietiestext