Robin functions and extremal functions
Given a compact set , for each positive integer n, let = := sup: p holomorphic polynomial, 1 ≤ deg p ≤ n. These “extremal-like” functions are essentially one-variable in nature and always increase to the “true” several-variable (Siciak) extremal function, := max[0, sup1/(deg p) log|p(z)|: p holomorphic polynomial, ]. Our main result is that if K is regular, then all of the functions are continuous; and their associated Robin functions increase to for all z outside a pluripolar set....