Abstract
We consider the action in Krein spaces of weakly closed J-symmetric operator algebras with identity possessing an invariant maximal nonnegative subspace, presented as a direct sum of a finite-dimensional neutral subspace and a uniformly positive subspace. A relation between these algebras (that in addition are assumed to be commutative) and function spaces of the type L ∞ σ ∩ L 2 v is established.
This work was completed with the support of project CONICIT (Venezuela) No 97000668.
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Dedicated to Professor Heinz Langer
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Strauss, V. (2005). A Functional Description for the Commutative WJ*-algebras of the D + κ -class. In: Langer, M., Luger, A., Woracek, H. (eds) Operator Theory and Indefinite Inner Product Spaces. Operator Theory: Advances and Applications, vol 163. Birkhäuser Basel. https://doi.org/10.1007/3-7643-7516-7_13
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