Pichkur, Volodymyr V. Properties of narrowing of a set. (Ukrainian. English summary) Zbl 1101.49305 Visn., Ser. Fiz.-Mat. Nauky, Kyïv. Univ. Im. Tarasa Shevchenka 2005, No. 1, 199-202 (2005). Summary: The notion of narrowing of a set is introduced. Properties of sets related to this notion are analyzed. MSC: 49J53 Set-valued and variational analysis 26E25 Set-valued functions Keywords:continuous multifunction; narrowing of set; enlargement of set PDFBibTeX XMLCite \textit{V. V. Pichkur}, Visn., Ser. Fiz.-Mat. Nauky, Kyïv. Univ. Im. Tarasa Shevchenka 2005, No. 1, 199--202 (2005; Zbl 1101.49305)