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Suppose that X is a complex Banach space with the norm parallel to.parallel to and n is a positive integer with X >= n >= 2. In this paper, we consider the generalized Roper-Suffridge extension operator Phi(n,beta 2,gamma 2,,) ,beta(n+1, gamma n+1)(f) on the domain Omega(p1,p2, , pn+1) defined by Phi(n,beta 2,gamma 2,,) ,beta(n+1, gamma n+1)(f)(x) = (n)Sigma(j=1) (f(x*(1)(x))/x*(1)(x))(beta j) (f'(x*(1)(x)))(gamma j)x*(j)(x)x(j) + (f(x*(1)(x))/x*(1)(x))(beta n+1)(f'(x*(1)(x)))(gamma n+1)(x -(n)Sigma(j=1)x*j(x)x(j)) for x is an element of Omega(p1,p2), ,(pn+1), where beta(1) = 1, gamma(1) = 0 and Omega p(1),p(2),, , p(n+1) = {x is an element of X : (n)Sigma(j=1) vertical bar x*(j)(x)vertical bar p(j) + parallel to x-(n)Sigma(j=1) x*(j)(x)x(j)parallel to(pn+1) < 1} with p(j) > 1 (j = 1, 2,..., n + 1), the linearly independent family {x(1),x(2),..,x(n)} subset of X and {x*(1), x*(2),.., x*(n)} subset of X* satisfy x*(j)(x(j)) = parallel to x(j)parallel to = 1 (J =1,2,...,n) and x*(J)(xk) = 0 (J not equal k), and we choose the branch of the power functions such that (f(xi)/xi)(beta j)vertical bar xi-0 =1 and (f'(xi)(gamma j)vertical bar(xi=0) =1, J = 2, .., n+1. We prove that the operator phi(n,beta 2,gamma 2,) .,beta(n+1,) gamma(n+1) (f) preserves almost spirallike mapping of type beta and order alpha or spirallike mapping of type beta and order alpha on Omega(p1,P2,) ,(pn+1) for some suitable constants beta(J,) gamma(J)
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SCIENCE IN CHINA SERIES A-MATHEMATICS
ISSN: 1006-9283
Year: 2009
Issue: 11
Volume: 52
Page: 2432-2446
0 . 5 8 4
JCR@2009
0 . 7 0 1
JCR@2011
JCR Journal Grade:3
Cited Count:
SCOPUS Cited Count: 1
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 1
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