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On traces of Bochner representable operators on the space of bounded measurable functions

Part of: Measures, integration, derivative, holomorphy Special classes of linear operators Linear function spaces and their duals

Published online by Cambridge University Press:  11 January 2024

Marian Nowak Open the ORCID record for Marian Nowak [Opens in a new window]  and
Juliusz Stochmal Open the ORCID record for Juliusz Stochmal [Opens in a new window]
Marian Nowak
Affiliation:
Institute of Mathematics, University of Zielona Góra, ul. Szafrana 4A, 65-516 Zielona Góra, Poland (M.Nowak@wmie.uz.zgora.pl)
Juliusz Stochmal
Affiliation:
Institute of Mathematics, Kazimierz Wielki University, ul. Powstańców Wielkopolskich 2, 85-090 Bydgoszcz, Poland (juliusz.stochmal@gmail.com)
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Abstract

Let Σ be a σ-algebra of subsets of a set Ω and $B(\Sigma)$ be the Banach space of all bounded Σ-measurable scalar functions on Ω. Let $\tau(B(\Sigma),ca(\Sigma))$ denote the natural Mackey topology on $B(\Sigma)$. It is shown that a linear operator T from $B(\Sigma)$ to a Banach space E is Bochner representable if and only if T is a nuclear operator between the locally convex space $(B(\Sigma),\tau(B(\Sigma),ca(\Sigma)))$ and the Banach space E. We derive a formula for the trace of a Bochner representable operator $T:B({\cal B} o)\rightarrow B({\cal B} o)$ generated by a function $f\in L^1({\cal B} o, C(\Omega))$, where Ω is a compact Hausdorff space.

Keywords

Bochner representable operatorskernel operatorsnuclear operatorsspaces of bounded measurable functionstrace of operatorvector measures

MSC classification

Primary: 46G10: Vector-valued measures and integration 47B10: Operators belonging to operator ideals (nuclear, $p$-summing, in the Schatten-von Neumann classes, etc.) 46E27: Spaces of measures
Type
Research Article
Information
Proceedings of the Edinburgh Mathematical Society , Volume 67 , Issue 1 , February 2024 , pp. 224 - 235
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on Behalf of The Edinburgh Mathematical Society.

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