About a condition for starlikeness

[摘要] A condition for starlikeness will be improved given by the inequality Re(f'(x) + alpha zf'' (z)) > 0, z is an element of U, concerning analytic functions of the form f(z) = z + a(2)z(2) +... which are defined on the unit disk U = {z is an element of C: vertical bar z vertical bar < 1}. (c) 2007 Elsevier Inc. All rights reserved.

[发布日期] 2007-11-15

[关键词] analytic functions;starlike functions;convolution