文摘
In this paper, we first introduce \({L^{{\sigma _1}}}{\left( {\log L} \right)^{{\sigma _2}}}\) conditions satisfied by the variable kernels Ω(x, z) for 0 ≤ σ 1 ≤ 1 and σ 2 ≥ 0. Under these new smoothness conditions, we will prove the boundedness properties of singular integral operators T Ω, fractional integrals T Ω,α and parametric Marcinkiewicz integrals μ Ω ρ with variable kernels on the Hardy spaces H p (R n ) and weak Hardy spaces WH p (R n ). Moreover, by using the interpolation arguments, we can get some corresponding results for the above integral operators with variable kernels on Hardy–Lorentz spaces H p,q(R n ) for all p < q < ∞.