satisfies 9c92" 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 on e858350f8184d8533ad8f9dd1" title="Click to view the MathML source">Cn the norm of LP on 8dec697251cee531644bf3870"> up to a logarithmic term 9c3576ac3897fd6e65ce7" title="Click to view the MathML source">(clogn)m2 can be estimated by the norm of P on bb58fe9ae6d866fabaf63e5b2">; here c≥1 denotes a universal constant. Moreover, for the 863f7b1bfd6a9e351210a" title="Click to view the MathML source">ℓp-norms 9ce4d865eeedf42">, e8527e3073507043352050fe22260" title="Click to view the MathML source">1≤p<2 the logarithmic term in the number n of variables is even superfluous.