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Operators on PIP-Spaces and Indexed PIP-Spaces

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Part of the Lecture Notes in Mathematics book series (LNM,volume 1986)

Abstract

As already mentioned, the basic idea of pip-spaces is that vectors should not be considered individually, but only in terms of the subspaces V r (r Є F), the building blocks of the structure. Correspondingly, an operator on a pipspace should be defined in terms of assaying subspaces only, with the proviso that only continuous or bounded operators are allowed. Thus an operator is a coherent collection of continuous operators. We recall that in a nondegenerate pip-space, every assaying subspace V r carries its Mackey topology \(\tau (V_r , V \bar{r})\) and thus its dual is \(V \bar{r}\). This applies in particular to \(V^{\#}\) and V itself. For simplicity, a continuous linear map between two pip-spaces α : XY will always mean a linear map α continuous for the respective Mackey topologies of X and Y. For the sake of generality, it is convenient to define directly operators from one pip-space into another one.

Keywords

  • Hilbert Space
  • Orthogonal Projection
  • Product Space
  • Unitary Representation
  • Dense Range

These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Correspondence to Jean-Pierre Antoine .

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© 2009 Springer-Verlag Berlin Heidelberg

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Antoine, JP., Trapani, C. (2009). Operators on PIP-Spaces and Indexed PIP-Spaces. In: Partial Inner Product Spaces. Lecture Notes in Mathematics(), vol 1986. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-05136-4_3

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