For any 1≤p<∞ and n≥2, let C(p,n) be the smallest constant such that for any complex polynomial f of degree n with zeroes z1,…,zn satisfying
n1i=1∑n∣zi∣p≤1,
and every zero f(ζ)=0 of f, there exists a critical point f′(ξ)=0 of f with ∣ξ−ζ∣≤C(p,n). What is C(p,n)?