On the difference of initial logarithmic coefficients for the class of univalent functions

In this paper we give estimates of the differences $|γ_3|-|γ_2|$ and $|γ_4|-|γ_3|$ for the class of functions $f$ univalent in the unit disc and normalized by $f(0)=f'(0)-1=0$. Here, $γ_{2}$, $γ_{3}$ and $γ_{4}$ are the initial logarithmic coefficients of the function $f$.