Dunford–Pettis operators on the space of Bochner integrable functions

Volume 95 / 2011

Marian Nowak Banach Center Publications 95 (2011), 353-358 MSC: 47B38, 47B05, 46E40, 46A70. DOI: 10.4064/bc95-0-21


Let $(\Omega,\Sigma,\mu)$ be a finite measure space and let $X$ be a real Banach space. Let $L^\Phi(X)$ be the Orlicz–Bochner space defined by a Young function $\Phi$. We study the relationships between Dunford–Pettis operators $T$ from $L^1(X)$ to a Banach space $Y$ and the compactness properties of the operators $T$ restricted to $L^\Phi(X)$. In particular, it is shown that if $X$ is a reflexive Banach space, then a bounded linear operator $T:L^1(X)\to Y$ is Dunford–Pettis if and only if $T$ restricted to $L^\infty(X)$ is $(\tau(L^\infty(X),L^1(X^*)),\|\cdot\|_Y)$-compact.


  • Marian NowakUniversity of Zielona Góra
    Faculty of Mathematics
    Computer Science and Econometrics
    ul. Prof. Szafrana 4A
    65–516 Zielona Góra, Poland

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