Landau's theorem for p-harmonic mappings in several variables

• Autorzy: Sh. Chen , S. Ponnusamy , X. Wang
• Języki publikacji: EN

Abstrakty

EN

A 2p-times continuously differentiable complex-valued function f = u + iv in a domain D ⊆ ℂ is p-harmonic if f satisfies the p-harmonic equation $Δ^pf=0$, where p (≥ 1) is a positive integer and Δ represents the complex Laplacian operator. If Ω ⊂ ℂⁿ is a domain, then a function $f:Ω → ℂ^m$ is said to be p-harmonic in Ω if each component function $f_i$ (i∈ {1,...,m}) of $f = (f₁,..., f_m)$ is p-harmonic with respect to each variable separately. In this paper, we prove Landau and Bloch's theorem for a class of p-harmonic mappings f from the unit ball 𝔹ⁿ into ℂⁿ with the form
$f(z) = ∑_{(k₁,..., kₙ) = (1,...,1)}^{(p,...,p)} |z₁|^{2(k₁-1)} ⋯ |zₙ|^{2(kₙ-1)}G_{p-k₁+1,...,p-kₙ+1}(z)$,
where each $G_{p-k₁+1,..., p-kₙ+1}$ is harmonic in 𝔹ⁿ for $k_{i} ∈ {1,...,p}$ and i ∈ {1,. .., n}.

Kategorie tematyczne

• 31B05: Harmonic, subharmonic, superharmonic functions
• 30C65: Quasiconformal mappings in 𝐑 n , other generalizations
• 30C10: Polynomials

• Wydawca: Institute of Mathematics Polish Academy of Sciences
• Czasopismo: Annales Polonici Mathematici
• Rocznik: 2012
• Tom: 103
• Numer: 1
• Strony: 67-87

Daty

wydano

2012

Twórcy

autor

Sh. Chen

• Department of Mathematics, Hunan Normal University, Changsha, Hunan 410081, People's Republic of China

autor

S. Ponnusamy

• Department of Mathematics, Indian Institute of Technology Madras, Chennai 600 036, India

autor

X. Wang

• Department of Mathematics, Hunan Normal University, Changsha, Hunan 410081, People's Republic of China

Identyfikatory

DOI

10.4064/ap103-1-6