On Visser's inequality concerning coefficient estimates for a polynomial

Suhail Gulzar, N. A. Rather, M. S Wani

If $P(z)={\sum }_{j=0}^n{a}_j{z}^j$ is a polynomial of degree $n$ having no zero in $|z|<1,$ then it was recently proved that for every $p\in [0,+\infty ]$ and $s=0,1,\dots ,n-1,$ \begin{…