satisfies 9c92" title="Click to view the MathML source">LP(x,…,x)=P(x) for every a333a7a" title="Click to view the MathML source">x∈Cn. We show that, although 9ff783edacefc" title="Click to view the MathML source">LP in general is non-symmetric, for a large class of reasonable norms on Cn the norm of 9ff783edacefc" title="Click to view the MathML source">LP on e531644bf3870"> up to a logarithmic term 9c3576ac3897fd6e65ce7" title="Click to view the MathML source">(clogn)m2 can be estimated by the norm of P on e6d866fabaf63e5b2">; here e6572fc7b46b1f8431e45a204f058" title="Click to view the MathML source">c≥1 denotes a universal constant. Moreover, for the b1bfd6a9e351210a" title="Click to view the MathML source">ℓp-norms 9ce4d865eeedf42">, 1≤p<2 the logarithmic term in the number n of variables is even superfluous.