For a power series $f(z) = \sum^\infty_{k = 0} a_kz^k$ let $S_n(f)$ denote the maximum modulus of the zeros of the $n$th partial sum of $f$ and let $r_n(f)$ denote ...

https://doi.org/10.4169/college.math.j.43.4.321 • https://www.jstor.org/stable/10.4169/college.math.j.43.4.321 Copy URL ...