55 research outputs found

    Subdifferential calculus for invariant linear ordered vector space-valued operators and applications

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    We give a direct proof of sandwich-type theorems for linear invariant partially ordered vector space operators in the setting of convexity. As consequences, we deduce equivalence results between sandwich, Hahn-Banach, separation and Krein-type extension theorems, Fenchel duality, Farkas and Kuhn-Tucker-type minimization results and subdifferential formulas in the context of invariance. As applications, we give Tarski-type extension theorems and related examples for vector lattice-valued invariant probabilities, defined on suitable kinds of events

    On Stone-type extensions for group-valued measures

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    A note on set-valued Henstock--McShane integral in Banach (lattice) space setting

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    We study Henstock-type integrals for functions defined in a Radon measure space and taking values in a Banach lattice XX. Both the single-valued case and the multivalued one are considered (in the last case mainly cwk(X)cwk(X)-valued mappings are discussed). The main tool to handle the multivalued case is a R{\aa}dstr\"{o}m-type embedding theorem established in [50]: in this way we reduce the norm-integral to that of a single-valued function taking values in an MM-space and we easily obtain new proofs for some decomposition results recently stated in [33,36], based on the existence of integrable selections. Also the order-type integral has been studied: for the single-valued case some basic results from [21] have been recalled, enlightning the differences with the norm-type integral, specially in the case of LL-space-valued functions; as to multivalued mappings, a previous definition ([6]) is restated in an equivalent way, some selection theorems are obtained, a comparison with the Aumann integral is given, and decompositions of the previous type are deduced also in this setting. Finally, some existence results are also obtained, for functions defined in the real interval [0,1][0,1].Comment: This work has been modified both as regards the drawing that with regard to the assumptions. A new version is contained in the paper arXiv:1503.0828

    The symmetric Choquet integral with respect to Riesz-space-valued capacities

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    summary:A definition of “Šipoš integral” is given, similarly to [3],[5],[10], for real-valued functions and with respect to Dedekind complete Riesz-space-valued “capacities”. A comparison of Choquet and Šipoš-type integrals is given, and some fundamental properties and some convergence theorems for the Šipoš integral are proved

    A skeleton of Fubini-type theorem in vector spaces for the Kurzweil integral and operator measures

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    Dieudonné-type theorems for lattice group-valued kk-triangular set functions

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    summary:Some versions of Dieudonné-type convergence and uniform boundedness theorems are proved, for kk-triangular and regular lattice group-valued set functions. We use sliding hump techniques and direct methods. We extend earlier results, proved in the real case. Furthermore, we pose some open problems

    Kuelbs-Steadman spaces for Banach space-valued measures

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    We introduce Kuelbs-Steadman-type spaces for real-valued functions, with respect to countably additive measures, taking values in Banach spaces. We investigate their main properties and embeddings in LpL^p-type spaces, considering both the norm associated to norm convergence of the involved integrals and that related to weak convergence of the integrals.Comment: 12 page
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