Commutator conditions implying the convergence of the Lie-Trotter products

In this paper we investigate commutator conditions for two strongly continuous semigroups and on a Banach space implying the convergence of the Lie-Trotter products . The results are then applied to various examples and, in particular, to the Ornstein-Uhlenbeck operator.

     

Boundedness of a class of super singular integral operators and the associated commutators

In this paper we give the (Lα p, Lp) boundedness of the maximal operator of a class of super singular integrals defined bywhich improves and extends the known result. Moreover, by applying an off-Diagonal T1 Theorem, we also obtain the (Lp, Lq) boundedness of the commutator defined by     

混合径角$\lambda$中心有界平均振荡空间的一个特征

在这篇文章中,我们通过Hardy算子交换子$\mathrm{H}_b$与它的对偶算子交换子$\mathrm{H}^*_b$, 其中$b\in {\mathrm{CMOL}^{p_2, \lambda}_{\rm rad}L^{p_1}_{\rm ang}(\mathbb R^n)}$,建立了混合径角$\lambda$中心有界平均振荡空间的一个特征.     

含参数加权极大Lebesgue空间中次线性算子的有界性质

引进一类含参数加权极大Lebesgue空间并得到满足一定尺寸条件的次线性算子在该类空间中的有界性质.特别地,还考虑了该类空间上次线性算子与BMO函数生成交换子的相应有界性质.     

Global well‐posedness for the 2D dissipative quasi‐geostrophic equations in modulation spaces

We prove the existence of global weak solution of the two‐dimensional dissipative quasi‐geostrophic equations with small initial data in and local well‐posedness with the large initial data in the same space. Our proof is based on constructing a commutator related to the problem, as well as its estimate. Copyright © 2017 John Wiley & Sons, Ltd.     

截断调和Bergman空间上小Hankel算子的代数性质

本文主要研究了截断调和Bergman空间$b_{n}^{2}$上以拟齐次函数为符号的小Hankel算子的有限秩乘积、换位子和半换位子问题.我们得到以拟齐次函数为符号的小Hankel算子的换位子和半换位子的秩总是有限的良好结论.     

Commutators in linear groups

Conditions are established on a group G which guarantee that the number of commutators required to express an arbitrary element of the commutator subgroup [G, G] of G is less than a fixed natural number N. Applications, when N=2, are made to infinite-dimensional automorphism groups, including infinite-dimensional linear groups.     

抽象Heisenberg不等式中的交换子

在抽象的Ｈｅｉｓｅｎｂｅｒｇ不等式中,交换于「Ａ,Ｂ」可能不是闭的或其定义也许太小,通过改变「Ａ,Ｂ」的定义及某种弱下的形式,对某一类自共轭算子给出了一个充分条件,使在该条件下「Ａ,Ｂ」的作用可用一个自共轭算代替,与比较,该条件更容易验证。     

带有齐次核的分数次积分交换子在Herz型Hardy空间上的有界性

算子[b,TΩ,α]表示由lipschitz函数b与带有齐次核的分数次积分算子TΩ,α生成的交换子．本文主要研究该交换子在Herz型Hardy空间上的有界性,得到了它是从HKq1^η,p（R^n）到Kq2^η,p（R^n）有界的．     

表特殊线性群中元素为平延换位子之积

考虑元素了数大于3的域F上的特殊线性群SLnF.对GLnF中任一矩阵A,记resA为A－I的秩,称矩阵A为平延,如果resA=I并且 detA=1,对n≥2,本文证明SLnF中任一矩阵都可写成不超过[resA/2] 2个平延换位子之积。