satisfies LP(x,…,x)=P(x) for every fc0c78a333a7a" title="Click to view the MathML source">x∈Cn. We show that, although fc" 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 fc" title="Click to view the MathML source">LP on up to a logarithmic term (clogn)m2 can be estimated by the norm of P on ; here fc7b46b1f8431e45a204f058" 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.