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2015 | OriginalPaper | Buchkapitel

8. Markovian Representations

verfasst von : Anders Lindquist, Giorgio Picci

Erschienen in: Linear Stochastic Systems

Verlag: Springer Berlin Heidelberg

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Abstract

The purpose of this chapter is to introduce coordinate-free representations of a stationary process y by constructing state spaces from basic principles. This will in particular accommodate both finite- and infinite-dimensional stochastic systems.

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Fußnoten
1
An alternative way of seeing this is to note that \(\mathcal{U}\) is a unitary (and hence normal) operator such that \(\mathcal{U}\mathbf{H} = \mathbf{H}\), where H is finite-dimensional. Such an operator obviously has a pure point spectrum consisting of eigenvalues of modulus one, and the space H is spanned by orthonormal eigenvectors.
 
2
P k → P in the weak operator topology if \(\langle f,P_{k}g\rangle _{\mathcal{X}}\rightarrow \langle f,Pg\rangle _{\mathcal{X}}\) for all \(f,g \in \mathcal{X}\).
 
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Metadaten
Titel
Markovian Representations
verfasst von
Anders Lindquist
Giorgio Picci
Copyright-Jahr
2015
Verlag
Springer Berlin Heidelberg
DOI
https://doi.org/10.1007/978-3-662-45750-4_8

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