3 results
Biholomorphic Mappings on Banach Spaces
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- Journal:
- Proceedings of the Edinburgh Mathematical Society / Volume 62 / Issue 4 / November 2019
- Published online by Cambridge University Press:
- 27 February 2019, pp. 913-924
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Extension Operators for Biholomorphic Mappings
- Part of
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- Journal:
- Canadian Mathematical Bulletin / Volume 62 / Issue 3 / September 2019
- Published online by Cambridge University Press:
- 07 January 2019, pp. 671-679
- Print publication:
- September 2019
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Suppose that
$D\subset \mathbb{C}$ is a simply connected subdomain containing the origin and 
$f(z_{1})$ is a normalized convex (resp., starlike) function on 
$D$. Let where
$$\begin{eqnarray}\unicode[STIX]{x1D6FA}_{N}(D)=\bigg\{(z_{1},w_{1},\ldots ,w_{k})\in \mathbb{C}\times \mathbb{C}^{n_{1}}\times \cdots \times \mathbb{C}^{n_{k}}:\Vert w_{1}\Vert _{p_{1}}^{p_{1}}+\cdots +\Vert w_{k}\Vert _{p_{k}}^{p_{k}}<\frac{1}{\unicode[STIX]{x1D706}_{D}(z_{1})}\bigg\},\end{eqnarray}$$
$p_{j}\geqslant 1$, 
$N=1+n_{1}+\cdots +n_{k}$, 
$w_{1}\in \mathbb{C}^{n_{1}},\ldots ,w_{k}\in \mathbb{C}^{n_{k}}$ and 
$\unicode[STIX]{x1D706}_{D}$ is the density of the hyperbolic metric on 
$D$. In this paper, we prove that is a normalized convex (resp., starlike) mapping on
$$\begin{eqnarray}\unicode[STIX]{x1D6F7}_{N,1/p_{1},\ldots ,1/p_{k}}(f)(z_{1},w_{1},\ldots ,w_{k})=(f(z_{1}),(f^{\prime }(z_{1}))^{1/p_{1}}w_{1},\ldots ,(f^{\prime }(z_{1}))^{1/p_{k}}w_{k})\end{eqnarray}$$
$\unicode[STIX]{x1D6FA}_{N}(D)$. If 
$D$ is the unit disk, then our result reduces to Gong and Liu via a new method. Moreover, we give a new operator for convex mapping construction on an unbounded domain in 
$\mathbb{C}^{2}$. Using a geometric approach, we prove that 
$\unicode[STIX]{x1D6F7}_{N,1/p_{1},\ldots ,1/p_{k}}(f)$ is a spiral-like mapping of type 
$\unicode[STIX]{x1D6FC}$ when 
$f$ is a spiral-like function of type 
$\unicode[STIX]{x1D6FC}$ on the unit disk.
Convex Subordination Chains in Several Complex Variables
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- Journal:
- Canadian Journal of Mathematics / Volume 61 / Issue 3 / 01 June 2009
- Published online by Cambridge University Press:
- 20 November 2018, pp. 566-582
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- 01 June 2009
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In this paper we study the notion of a convex subordination chain in several complex variables. We obtain certain necessary and sufficient conditions for a mapping to be a convex subordination chain, and we give various examples of convex subordination chains on the Euclidean unit ball in
${{\mathbb{C}}^{n}}$. We also obtain a sufficient condition for injectivity of 
$f(z/\|z\|,\,\,\|z\|)$ on 
${{B}^{n}}\backslash \{0\}$, where 
$f(z,t)$ is a convex subordination chain over 
$(0,1)$.
