Mathematics – Functional Analysis
Scientific paper
2010-06-15
Studia Math. 201 (2010), 65-67
Mathematics
Functional Analysis
2 pages
Scientific paper
We prove that for each dense non-compact linear operator $S:X\to Y$ between
Banach spaces there is a linear operator $T:Y\to c_0$ such that the operator
$TS:X\to c_0$ is not compact. This generalizes the Josefson-Nissenzweig
Theorem.
Banakh Iryna
Banakh Taras
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