On d-characteristic and $d_Ξ$-characteristic of linear operators

Instytut Matematyczny Polskiej Akademii Nauk / Institute of Mathematics / Publishing house / Journals and Serials / Annales Polonici Mathematici / All issues

D. Przeworska-Rolewicz, S. Rolewicz Annales Polonici Mathematici 19 (1967), 117-121 DOI: 10.4064/ap-19-2-117-121