数学季刊 ›› 2012, Vol. 27 ›› Issue (3): 323-327.
摘要: In this paper, we prove that: if M is a family which has convexity radius, then the convexity radius for M and the second order item coefficients of every mapping in M are closely related to each other. As an application, we show that the convexity radius of starlike mappings r(S*) < 2-√3.
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