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On set-valued cone absolutely summing maps

Coenraad LabuschagneValeria Marraffa — 2010

Open Mathematics

Spaces of cone absolutely summing maps are generalizations of Bochner spaces L p(μ, Y), where (Ω, Σ, μ) is some measure space, 1 ≤ p ≤ ∞ and Y is a Banach space. The Hiai-Umegaki space 1 , c b f ( X ) of integrably bounded functions F: Ω → cbf(X), where the latter denotes the set of all convex bounded closed subsets of a separable Banach space X, is a set-valued analogue of L 1(μ, X). The aim of this work is to introduce set-valued cone absolutely summing maps as a generalization of 1 , c b f ( X ) , and to derive necessary...

The McShane, PU and Henstock integrals of Banach valued functions

Luisa Di PiazzaValeria Marraffa — 2002

Czechoslovak Mathematical Journal

Some relationships between the vector valued Henstock and McShane integrals are investigated. An integral for vector valued functions, defined by means of partitions of the unity (the PU-integral) is studied. In particular it is shown that a vector valued function is McShane integrable if and only if it is both Pettis and PU-integrable. Convergence theorems for the Henstock variational and the PU integrals are stated. The families of multipliers for the Henstock and the Henstock variational integrals...

Variational Henstock integrability of Banach space valued functions

Luisa Di PiazzaValeria MarraffaKazimierz Musiał — 2016

Mathematica Bohemica

We study the integrability of Banach space valued strongly measurable functions defined on [ 0 , 1 ] . In the case of functions f given by n = 1 x n χ E n , where x n are points of a Banach space and the sets E n are Lebesgue measurable and pairwise disjoint subsets of [ 0 , 1 ] , there are well known characterizations for Bochner and Pettis integrability of f . The function f is Bochner integrable if and only if the series n = 1 x n | E n | is absolutely convergent. Unconditional convergence of the series is equivalent to Pettis integrability of f ....

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