假定Tσ是关于乘子σ的双线性Fourier乘子算子,其中σ满足如下Sobolev正则条件:对某个s∈(n,2n],有supk∈z||σk||wa(R2n)〈∞.对于P1,P2,P∈(1,∞)且满足1/p=1/p1+1/p2和ω=(ω1,ω2)∈Ag/t(R2n),建立了Tσ及其与函数b=(b1,b2)∈(BMO(Rn))2生成的交换子Tσ,b由L(ω2)到Lp,λ(vω)的有界性;同时,在b1,b2∈CMO在BMO拓扑下的闭包)的条件下,证明交换子Ti是的紧算子.为了得到主要结果,我们先后建立了几个双(次)线性极大函数在加多权Morrey空间上的有界性以及该空间中准紧集的判定.
Let Ta be the bilinear Fourier multiplier operator associated with multiplier a satisfying the Sobolev regularity that supk∈z||σk||wa(R2n)〈∞ for some s∈(n,2n]. We give the boundedness of Tσ and the commutators Tσ,b generated by Tσ and b = (bl, b2)∈ (BMO(Rn)}2, as well as the compactness of, the BMO-closure of Cc (Rn)) from to Lp for appropriate indices Pl, P2, P c (1,0e) (1/p = 1/pl + l/p2) and multiple weights ω = (ω1,ω2) ∈ Ap/t(R2n). The main ingredient is to establish the multiple weighted estimates for the variants of certain multi(sub)linear maximal operators on the weighted Morrey spaces, and a sufficient condition for a subset in the weighted Morrey spaces to be a strongly pre- compact set, which are in themselves interesting.