The vector-valued Dirichlet-type spaces on the unit ball of C^n isintroduced. We discuss the pointwise multipliers of Dirichlet-type spaces. Sufficient conditions ofthe pointwise multipliers of D_(mu)~2 for 0<=mu &...The vector-valued Dirichlet-type spaces on the unit ball of C^n isintroduced. We discuss the pointwise multipliers of Dirichlet-type spaces. Sufficient conditions ofthe pointwise multipliers of D_(mu)~2 for 0<=mu <2 if n=1 or D_(mu,q)~2 for 0 =2 aregiven. Finally, Rademacher p-type space is characterized by vector-valued sequence spaces.展开更多
In this note, some conditions of composition operators on DT spaces to be bounded are given by means of Carleson measures and pointwise multipliers, for some ranges of T. The authors prove that (i) Let 1 < T n + 2...In this note, some conditions of composition operators on DT spaces to be bounded are given by means of Carleson measures and pointwise multipliers, for some ranges of T. The authors prove that (i) Let 1 < T n + 2 and 2k < T 2k + 1 (or 2k - 1 < T 2k) for some positive integer k. Suppose = ( 1,… , n) be a univalent mapping from B into itself, denote dμj(l) (z) = R(l) j (z) 2(k-l+2) (1 - z 2)2k-t+1dv(z) for l= 1, 2,… , k + 1. If μj(l)-1 are (T - 2k + 2l-4)-Carleson measures for all l, then the composition operator C on DT is bounded; (ii) Let 1 < T n + 2, = ( 1,… , n) be univalent and the Frechet derivative of -1 be bounded on (B). If R j ∈ M(DT-2) for all j, then the composition operator C on DT is bounded; (iii) Let T > n + 2 and as in (ii). If j ∈ DT for all j, then the composition operator C on DT is bounded.展开更多
In this paper the small Hankel operators on the Dirichlet-type spaces D p on the unit ball of C n are considered. A similar result to that of the one-dimensional setting is given, which characterizes the boundedness o...In this paper the small Hankel operators on the Dirichlet-type spaces D p on the unit ball of C n are considered. A similar result to that of the one-dimensional setting is given, which characterizes the boundedness of the small Hankel operators on D p .展开更多
Let p>0 andνbe a normal function on[0,1).In this paper,several equivalent characterizations are given for which composition operators are bounded or compact on the normal weight Dirichlet type space D_(ν)^(p)(D)i...Let p>0 andνbe a normal function on[0,1).In this paper,several equivalent characterizations are given for which composition operators are bounded or compact on the normal weight Dirichlet type space D_(ν)^(p)(D)in the unit disc.展开更多
文摘The vector-valued Dirichlet-type spaces on the unit ball of C^n isintroduced. We discuss the pointwise multipliers of Dirichlet-type spaces. Sufficient conditions ofthe pointwise multipliers of D_(mu)~2 for 0<=mu <2 if n=1 or D_(mu,q)~2 for 0 =2 aregiven. Finally, Rademacher p-type space is characterized by vector-valued sequence spaces.
基金the Natural Science Foundation of Guangdong Province.
文摘In this note, some conditions of composition operators on DT spaces to be bounded are given by means of Carleson measures and pointwise multipliers, for some ranges of T. The authors prove that (i) Let 1 < T n + 2 and 2k < T 2k + 1 (or 2k - 1 < T 2k) for some positive integer k. Suppose = ( 1,… , n) be a univalent mapping from B into itself, denote dμj(l) (z) = R(l) j (z) 2(k-l+2) (1 - z 2)2k-t+1dv(z) for l= 1, 2,… , k + 1. If μj(l)-1 are (T - 2k + 2l-4)-Carleson measures for all l, then the composition operator C on DT is bounded; (ii) Let 1 < T n + 2, = ( 1,… , n) be univalent and the Frechet derivative of -1 be bounded on (B). If R j ∈ M(DT-2) for all j, then the composition operator C on DT is bounded; (iii) Let T > n + 2 and as in (ii). If j ∈ DT for all j, then the composition operator C on DT is bounded.
基金Supported by National Natural Science Foundation of China,10101013
文摘In this paper the small Hankel operators on the Dirichlet-type spaces D p on the unit ball of C n are considered. A similar result to that of the one-dimensional setting is given, which characterizes the boundedness of the small Hankel operators on D p .
基金supported by the National Natural Science Foundation of China(Grant No.11942109).
文摘Let p>0 andνbe a normal function on[0,1).In this paper,several equivalent characterizations are given for which composition operators are bounded or compact on the normal weight Dirichlet type space D_(ν)^(p)(D)in the unit disc.
