## Hyperbolic Geometry on Noncommutative Balls

- Gelu Popescu, Joachim Cuntz
- 2009

Let T := [T1, . . . , Tn] be an n-tuple of operators on a Hilbert space such that T is a completely non-coisometric row contraction. We establish the existence of a “one-toone” correspondence between the joint invariant subspaces under T1, . . . , Tn, and the regular factorizations of the characteristic function ΘT associated with T . In particular, we… (More)

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