Beurling and Model subspaces invariant under a universal operator

Ben Hur Eidt, S. Waleed Noor

In this article, we characterize the Beurling and Model subspaces of the Hardy-Hilbert space $H^2(\mathbb{D})$ invariant under the composition operator $C_{{\varphi }_a}f=f\circ {\varphi }_a$, where…