Twisted sums, Fenchel-Orlicz spaces and property (M)

George Androulakis, C. D. Cazacu, Nigel J. Kalton

We study certain twisted sums of Orlicz spaces with non-trivial type which can be viewed as Fenchel-Orlicz spaces on ${\mathbf{R}}^2$. We then show that a large class of Fenchel-O…