Backward shift invariant subspaces in the bidisc
Backward shift invariant subspaces in the bidiscSuppose T<I> is a Toeplitz operator with a symbol <p on the Hardy space on the bidisc, H2. Let N be a backward shift invariant subspace of H2, that is, N is an invariant subspace under r; and r;.Let P be the orthogonal projection from H2 onto N. For </Jin H00 , put S</> = PT<t>JN.
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