Approximation of vector valued functions (Q1380157)

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scientific article; zbMATH DE number 1121766
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Approximation of vector valued functions
scientific article; zbMATH DE number 1121766

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    Approximation of vector valued functions (English)
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    8 April 1999
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    It is known that a lower semi-continuous function from a metric space to \([0,\infty)\) can be approximated by an increasing sequence of Lipschitz continuous functions. This is generalized to a class of vector lattice valued functions. For a complete Banach lattice \(E\), an extension \(E^*\) is considered by adjoining an ``\(\infty\)''. An appropriate type of continuity, called inf-continuity, is considered in proving approximation results. The Lipschitz approximation leads to the consideration of a variational inferior limit and a convergence concept called \(V\)-convergence. Various results describing convergence are provided and these results are applied to obtain stochastic theorems.
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    Lipschitz approximation
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    lower semi-continuous function
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    Lipschitz continuous functions
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    complete Banach lattice
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    inf-continuity
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    variational inferior limit
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    \(V\)-convergence
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    stochastic theorems
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