English

Bergman projection on Lebesgue space induced by doubling weight

Complex Variables 2023-06-16 v1 Functional Analysis

Abstract

Let ω\omega and ν\nu be radial weights on the unit disc of the complex plane, and denote σ=ωpνpp\sigma=\omega^{p'}\nu^{-\frac{p'}p} and ωx=01sxω(s)ds\omega_x =\int_0^1 s^x \omega(s)\,ds for all 1x<1\le x<\infty. Consider the one-weight inequality \begin{equation}\label{ab1} \|P_\omega(f)\|_{L^p_\nu}\le C\|f\|_{L^p_\nu},\quad 1<p<\infty,\tag{\dag} \end{equation} for the Bergman projection PωP_\omega induced by ω\omega. It is shown that the moment condition Dp(ω,ν)=supnN{0}(νnp+1)1p(σnp+1)1pω2n+1< D_p(\omega,\nu)=\sup_{n\in \mathbb{N}\cup\{0\}}\frac{\left(\nu_{np+1}\right)^\frac1p\left(\sigma_{np'+1}\right)^\frac1{p'}}{\omega_{2n+1}}<\infty is necessary for \eqref{ab1} to hold. Further, Dp(ω,ν)<D_p(\omega,\nu)<\infty is also sufficient for \eqref{ab1} if ν\nu admits the doubling properties sup0r<1r1ω(s)sds1+r21ω(s)sds<\sup_{0\le r<1}\frac{\int_r^1 \omega(s)s\,ds}{\int_{\frac{1+r}{2}}^1 \omega(s)s\,ds}<\infty and sup0r<1r1ω(s)sdsr11rKω(s)sds<\sup_{0\le r<1}\frac{\int_r^1 \omega(s)s\,ds}{\int_r^{1-\frac{1-r}{K}} \omega(s)s\,ds}<\infty for some K>1K>1. In addition, an analogous result for the one weight inequality Pω(f)Dν,kpCfLνp, \|P_\omega(f)\|_{D^p_{\nu,k}}\le C\|f\|_{L^p_\nu}, where fDν,kpp=j=0k1f(j)(0)p+Df(k)(z)p(1z)kpν(z)dA(z)<,kN, \Vert f \Vert_{D^p_{\nu, k}}^p =\sum\limits_{j=0}^{k-1}| f^{(j)}(0)|^p+ \int_{\mathbb{D}} \vert f^{(k)}(z)\vert^p (1-|z| )^{kp}\nu(z)\,dA(z)<\infty, \quad k\in \mathbb{N}, is established. The inequality \eqref{ab1} is further studied by using the necessary condition Dp(ω,ν)<D_p(\omega,\nu)<\infty in the case of the exponential type weights ν(r)=exp(α(1rl)β)\nu(r)=\exp \left(-\frac{\alpha}{(1-r^l)^{\beta}} \right) and ω(r)=exp(α~(1rl~)β~)\omega(r)= \exp \left(-\frac{\widetilde{\alpha}}{(1-r^{\widetilde{l}})^{\widetilde{\beta}}} \right), where 0<α,α~,l,l~<0<\alpha, \, \widetilde{\alpha}, \, l, \, \widetilde{l}<\infty and 0<β,β~10<\beta , \, \widetilde{\beta}\le 1.

Keywords

Cite

@article{arxiv.2306.08255,
  title  = {Bergman projection on Lebesgue space induced by doubling weight},
  author = {José Ángel Peláez and Elena de la Rosa and Jouni Rättyä},
  journal= {arXiv preprint arXiv:2306.08255},
  year   = {2023}
}