排序方式: 共有7条查询结果,搜索用时 14 毫秒
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设{αk}∞k=-∞为正数缺项序列,满足infkαk+1/dk=α>1,Ω(y′)为Besov空间B0,11(Sn-1)上的函数,其中Sn-1为Rn(n2)上的单位球面.本文证明:若∫Sn-1Ω(y′)dσ(y′)=0,则离散型奇异积分TΩ(f)(x)=∑∞k=-∞∫Sn-1f(x-αky′)Ω(y′)dσ(y′)和相关的极大算子TΩ(f)(x)=supN∑∞k=N∫Sn-1f(x-αky′)Ω(y′)dσ(y′)均在L2(Rn)上有界.上述结果推广了Duoandikoetxea和RubiodeFrancia[1]在L2情形下的一个结果 相似文献
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Let 1<q<∞, n(1−1/q)≤α<∞, 0<p<∞ and ω1,ω2 ɛA
1(R
n
) (the Muckenhoupt class). In this paper, the author introduce the weighted Herz-type Hardy spaces hk
q
α,p
(gw1,ω2) and present their atomic decomposition. Using the atomic decomposition, the author find out their dual spaces, establish
the boundedness on these spaces of the pseudo-differential operators of order zero and show thatD(R
n
), the class of C∞(Rn)-functions with compactly support, is dense inhK
q
α,p
(ω1,ω2) and there is a subsequence, which converges in distrbutional sense to some distribution ofhK
q
α,p
(ω1,ω2), of any bounded sequence inhK
q
α,p
(ω1,ω2). In addition, the author also set up the boundedness of some non-linear quantities in compensated compactness.
Supported by the NECF and the NECF and the NNSF of China. 相似文献
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针对温室夏季气温过高,严重影响植物生育的问题,本文对温室湿帘风机降温系统热环境进行了理论分析,建立了温室热环境的理论计算模型,并进行了试验验证。结果表明,理论计算与实测值吻合较好。通过对北京地区夏季温室热环境的预测,提出了这种温室适宜的结构与运行参数。 相似文献
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Fan Dashan 《数学年刊B辑(英文版)》1996,17(4):434-444
§1.IntroductionSupposethatGisacompactLiegroupand^GisamaximalcollectionofinequivalentirreducibleunitaryrepresentationofG.Givenaboundedmultisequence{m(λ)}λ∈^G,m(λ)∈C|,definetheoperatorTonthespaceoffinitelinearcombinationsofentryfunctionsonGbywriting(T^f)(λ)=m(λ)^… 相似文献
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在一维的Fourier级数理论中,设f∈L_((0,2x),如关系式: integral from 0 to h{f(θ+t)-f(θ-t)}dt=o(|n|/(㏒1/|n|,(h→0) 关于θ均匀地成立,则称f满足Salem条件。佐藤于日本的学士院纪事中指出:如果f满足Salem条件,则在f的每一Lebesgue点x_0,其Fourier级数[f;x_0]收敛。G.Freud改进了佐藤的结论,证明了如f满足Salem条件,且存在θ_0满足 相似文献
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