# Wydawnictwa / Banach Center Publications / Wszystkie tomy

## Decompositions of Beurling type for $E_0$-semigroups

### Tom 73 / 2006

Banach Center Publications 73 (2006), 167-176 MSC: Primary 46L55, 47D03; Secondary 81S25. DOI: 10.4064/bc73-0-11

#### Streszczenie

We define tensor product decompositions of $E_0$-semigroups with a structure analogous to a classical theorem of Beurling. Such decompositions can be characterized by adaptedness and exactness of unitary cocycles. For CCR-flows we show that such cocycles are convergent.

#### Autorzy

• Rolf GohmDepartment of Mathematics