On semi-Fredholm operators and the conjugate of a product of operators

Instytut Matematyczny Polskiej Akademii Nauk / Institute of Mathematics / Publishing house / Journals and Serials / Studia Mathematica / All issues

K. Förster, E. Liebetrau Studia Mathematica 59 (1977), 301-306 DOI: 10.4064/sm-59-3-301-306