title: Inclusions in a single variable in ultrametric spaces and Hyers-Ulam stability.
abstract: We present some properties of set-valued inclusions in a single variable in ultrametric spaces. As a consequence, we obtain stability results for the corresponding functional equations.
authors.affiliation: Pedagogical University, Podchorążych 2, 30-084 Kraków, Poland.
authors.forename: Magdalena
authors.initials: M
authors.lastname: Piszczek
mesh_terms: D000465:Algorithms; D008433:Mathematics; D008962:Models, Theoretical