A Helson-Lowdenslager-deBranges Theorem in 𝐿²

Paulsen, Vern; Singh, Dinesh

doi:10.1090/S0002-9939-00-05716-6

A Helson-Lowdenslager-deBranges Theorem in $L^2$
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by Vern I. Paulsen and Dinesh Singh PDF

Proc. Amer. Math. Soc. 129 (2001), 1097-1103 Request permission

Abstract:

This paper presents a generalization of the invariant subspace theorem of Helson and Lowdenslager along the lines of de Branges’ generalization of Beurling’s theorem.

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