satisfies e154179b08c98b0b41709c92" title="Click to view the MathML source">LP(x,…,x)=P(x) for every x∈Cn. We show that, although LP in general is non-symmetric, for a large class of reasonable norms 583f071dafac35731"> on 58350f8184d8533ad8f9dd1" title="Click to view the MathML source">Cn the norm of LP on up to a logarithmic term (clogn)m2 can be estimated by the norm of P on 58fe9ae6d866fabaf63e5b2">; here 58" title="Click to view the MathML source">c≥1 denotes a universal constant. Moreover, for the ℓp-norms , 1≤p<2 the logarithmic term in the number n of variables is even superfluous.