arXiv subjects
Publications and source records attributed to Fangqin Ye.
In this paper, for $p>1$ and $s>1$, we give a complete description of the boundedness and compactness of a Cesàro-like operator from the Besov space $B_p$ into a Banach space $X$ between the mean Lipschitz space $Λ^s_{1/s}$ and the Bloch space.
For $0<s<1$, let $\{z_n\}$ be a sequence in the open unit disk such that $\sum_n (1-|z_n|^2)^s δ_{z_n}$ is an $s$-Carleson measure. In this paper, we consider the connections between this $s$-Carleson measure and the theory of Möbius invariant $F(p, p-2, s)$ spaces by the Volterra type operator, the reciprocal of a Blaschke product, and second order complex differential equations having a prescribed zero sequence.
Let $B_p(s)$ be an analytic Besov type space. Let $M(B_p(s))$ be the class of multipliers of $B_p(s)$ and let $F(p, p-2, s)$ be the Möbius invariant subspace generated by $B_p(s)$. In this paper, when $0<s<1$ and $\max\{s, 1-s\}<p\leq 1$, we give a completed description of interpolating sequences for $M(B_p(s))$ and $F(p, p-2, s)\cap H^\infty$. We also consider certain condition appeared in this description by an $L^p$ characterization and the closure of $F(p, p-2, s)$ in the Bloch space.
The Möbius invariant space $\mathcal{Q}_p$, $0 1$ and it does not hold for $0<p\leq 1$.
In this note, we investigate a condition related to the characterization of Hankel measures on Hardy space. We address a problem mentioned by J. Xiao in 2000.
Let $X$ be the dual space of a Luecking-type subspace of the Bergman space $A^1$. It is known that the Bloch space $\mathcal{B}$ is a subset of $X$. In 1990, Ghatage and Sun asked whether $\mathcal{B}$ is dense in $X$. They also asked whether the little version of $X$ is a subset of $\mathcal{B}$. In this note, based on results and methods of Girela, Peláez, Pérez-González and Rättyä in 2008, we answer the two questions in the negative.
Using the Cauchy-Riemann operator, we characterize $Q_K$ spaces, Besov spaces and analytic Morrey spaces in terms of pseudoanalytic extensions of primitive functions. Our results are also true on some classical Banach spaces, such as the Bloch space, $BMOA$ and the Dirichlet space.