Ernst Albrecht, Florian-Horia Vasilescu
Abstract
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Extending results and methods of Thomson and Trent, we prove the existence of non trivial quasi-invariant subspaces for subnormal families of unbounded operators having sufficiently rich domains. In some special cases, proper invariant subspaces are obtained.
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Extending results and methods of Thomson and Trent, we prove the existence of non trivial quasi-invariant subspaces for subnormal families of unbounded operators having sufficiently rich domains. In some special cases, proper invariant subspaces are obtained.
Key concepts: Linear subspace, Invariant (physics), Mathematics, Pure mathematics, Algebra over a field, Mathematical physics