Normal Extensions Escape from the Class of Weighted Shifts on Directed Trees
- First Online:
- Cite this article as:
- Jabłoński, Z.J., Jung, I.B. & Stochel, J. Complex Anal. Oper. Theory (2013) 7: 409. doi:10.1007/s11785-011-0177-7
- 101 Downloads
A formally normal weighted shift on a directed tree is shown to be a bounded normal operator. The question of whether a normal extension of a subnormal weighted shift on a directed tree can be modeled as a weighted shift on some, possibly different, directed tree is answered.