科研之友
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摘要
In this article, we establish distortion theorems for some various subfamilies of Bloch mappings defined in the unit polydisc D-n with critical points, which extend the results of Liu and Minda to higher dimensions. We obtain lower bounds of vertical bar det(f'(z))vertical bar and R det(f'(z)) for Bloch mapping f. As an application, some lower and upper bounds of Bloch constants for the subfamilies of holomorphic mappings are given.
