在C^n中的单位球上进一步推广了Roper-Suffridge算子,并讨论推广后的算子保持双全纯映照子族的性质,证明在一定条件下,推广后的Roper-Suffridge算子在C^n中的单位球B^n上能嵌入Loewner链,进而从Loewner链的角度出发证明推广后的算子在一定条件下保持α次殆β型螺形性,从而得出推广后的Roper-Suffridge算子在一定条件下在B^n上保持β型螺形性,α次殆星形性及星形性.
The Roper-Suffridge extension operator is ulteriorly generalized on the unit ball in C^n, and it is discussed that the generalized operator preserves some properties of subclasses of biholomorphic mappings. The fact that the generalized operator can be embeded in a Loewner chains under certain conditions on the unit ball in Cn is proved. And that the generalized operator preserves almost spirallikeness of typeβ and order a under certain conditions is proved from the point of view of Loewner chains, thereby the generalized operator can preserve spirallikeness of typeβ, almost starlikeness of order α and starlikeness under certain conditions on B^n.