首先给出了C~n中单位多圆柱D~n上准凸映射f关于Jacobin矩阵J_f(z)的偏差定理.该定理是单位圆盘凸函数的偏差定理在多复变中的推广.其次得到了Banach空间单位球上准凸映射的偏差定理的上界.最后给出了关于准凸映射偏差定理的两个猜想.
Firstly,the authors are concerned with the distortion theorem for the Jacobian matrix J_f(z) in the case of quasi-convex mapping f on the unit polydisc D~n in C~n.The result is a new generalization to the case of several complex variables of the well-known distortion theorem for convex functions of the unit disc.Secondly,the authors obtain the upper bound estimate of the distortion theorem for quasi-convex mappings on the unit ball of a complex Banach space.Finally,two conjectures are given for quasi-convex mappings on the unit polydisc as well as on the unit ball of a complex Banach space.