This is an announcement for the paper “Approximation of norms on Banach spaces” by Richard J. Smithhttps://arxiv.org/search?searchtype=author&query=Smith%2C+R+J, Stanimir Troyanskihttps://arxiv.org/search?searchtype=author&query=Troyanski%2C+S.

Abstract: Relatively recently it was proved that if $\Gamma$ is an arbitrary set, then any equivalent norm on $c_0(\Gamma)$ can be approximated uniformly on bounded sets by polyhedral norms and $C^{\infty}$ smooth norms, with arbitrary precision. We extend this result to more classes of spaces having uncountable symmetric bases, such as preduals of the `discrete' Lorentz spaces $d(w, 1,\gamma)$, and certain symmetric Nakano spaces and Orlicz spaces. We also show that, given an arbitrary ordinal number $\alpha$, there exists a scattered compact space $K$ having Cantor-Bendixson height at least $\alpha$, such that every equivalent norm on $C(K)$ can be approximated as above.

The paper may be downloaded from the archive by web browser from URL https://arxiv.org/abs/1804.05660