A characterization of invariant subspaces for isometric representations of product system over ${\mathbb{N}}_0^k$

Dimple Saini, Harsh Trivedi, Shankar Veerabathiran

Using the Wold-von Neumann decomposition for the isometric covariant representations due to Muhly and Solel, we prove an explicit representation of the commutant of a doubly commut…