Arnold's seminar 05.10.99 S.M.Gusein-Zade Ob osobennostyakh tipa $A_k$ na ploskikh krivykh fiksirovannoj stepeni. (talk postponed from 14.09.99) Pust' $k(d)$ - naibol'shee tseloe $k$ takoe, chto suschestvuet ploskaya krivaya stepeni $d$, imeyuschaya osobennost' tipa $A_k$. Mozhno pokazat', chto $\overline{\lim}_{d\rightarrow\infty}k(d)/d^2\le 3/4$. Stroitsya primer krivoj stepeni $28s+9$ ($s\in\Z_{\ge 0}$), imeyuschej osobennost' tipa $A_k$ s $k=420s^2+269s+42$. Takim obrazom $\underline{\lim}_{d\rightarrow\infty}k(d)/d^2\ge 15/28$ (zamet'te, chto $15/28>1/2$). Rezul'tat polucheny sovmestno s N.N.Nekhoroshevym.