A class of quasisymmetric mappings with substantial points  

作　　者：Zhong Li Shengjian Wu Yi Qi 

机构地区：[1]Peking Univ, Sch Math Sci, Beijing 100871, Peoples R China

出　　处：《Chinese Science Bulletin》2000年第4期313-316,共4页

摘　　要：It is proved that Kq(h)=K0(h) for every h in some class of quasisymmetric mappings of the unit circle with substantial points, where Kq(h):=sup{M(h(Q))/M(Q); Qis a quadrilateral with the domain unit disk} and K0(h) is the extremal maximum dilatation of h.It is proved thatK q (h)=K 0(h) for everyh in some class of quasisymmetric mappings of the unit circle with substantial points, whereK q (h):=sup{M(h(Q))/M(Q);Q is a quadrilateral with the domain unit disk} andK 0(h) is the extremal maximum dilatation ofh.

关 键 词：quasisymmetric MAPPING EXTREMAL MAPPING substantial point. 

分 类 号：O157.5[理学—数学]