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Weak topology and a differentiable operator for Lipschitz maps

By Abbas Edalat


Weak topology and differentiable operator for Lipschitz maps We show that the Scott topology induces a topology for real-valued Lipschitz maps on Banach spaces which we call the L-topology. It is the weakest topology with respect to which the L-derivative operator, as a second order functional on the space of Lipschitz maps into the domain of non-empty, convex and weak*-compact valued functions ordered by reverse inclusion, is continuous. For finite dimensional Euclidean spaces, where the L-derivative and the Clarke gradient coincide, we provide a simple characterisation of the basic open subsets of the L-topology in terms of ties or primitive maps of functions. We use this to verify that the well-known Lipschitz norm topology is finer than the L-topology. The L-topology is shown to be separable and equivalent to a complete metric induced from the Hausdorff metric. We then develop a fundamental theorem of calculus of second order showing that the continuous integral operator from the continuous Scott domain of non-empty convex and compact valued functions to the continuous Scott domain of ties is inverse to the continuous operator induced by the L-derivative

Topics: Key Words, Domain theory, Weakest topology, Second order functionals, Fundamental Theorem of Calculus
Year: 2009
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