2014.07.23 15:19
실적년도 | 2012년 |
---|---|
논문구분 | 국외 |
총저자 | Piotr Budzynski, Zenon Jan Jabłonski, Il Bong Jung, Jan Stochel |
학술지명 | Annali di Matematica Pura ed Applicata |
권(Vol.) | 193 |
호(No.) | 3 |
게재년월 | 2014년 5월 |
Impact Factor | |
SCI 등재 | SCIE |
비고 |
Fundamental properties of unbounded composition operators in L2-spaces are studied. Characterizations of normal and quasinormal composition operators are provided. Formally normal composition operators are shown to be normal. Composition operators generating Stieltjes moment sequences are completely characterized. The unbounded counterparts of the celebrated Lambert's characterizations of subnormality of bounded composition operators are shown to be false. Various illustrative examples are supplied.