求和多重线性算子的Pietsch-Maurey-Rosenthal分解
Pietsch-Maurey-Rosenthal factorization of summing multilinear operators
摘要：
本文的主要目的是研究一类作用于具有某些非平凡格凸性的巴拿赫格的乘积的求和多重线性算子。在比通过$L^q$ -空间乘积的Maurey-Rosenthal分解所需的凸性要求更弱的条件下，证明了这类算子的混合Pietsch-Maurey-Rosenthal型分解定理.我们的分解的副积是由$q$ -凸型性质定义的多重线性算子到特殊Banach函数格的乘积的推广，这些Banach函数格继承了定义域空间的一些格几何性质，如序连续性和$p$ -凸性.通过Fremlin的张量积的因式分解也进行了分析。应用于研究Banach函数格之间的一类特殊的线性算子，它们可以用强形式的$q$ -算子刻画.这类算子包含$q$ -支配算子，因此所得结果为这类算子提供了一个~新的因子分解定理.
英文摘要：
The main purpose of this paper is the study of a~new class of summing multilinear operators acting from the product of Banach lattices with some nontrivial lattice convexity. A~mixed Pietsch-Maurey-Rosenthal type factorization theorem for these operators is proved under weaker convexity requirements than the ones that are needed in the Maurey-Rosenthal factorization through products of $L^q$-spaces. A~by-product of our factorization is an extension of multilinear operators defined by a~$q$-concavity type property to a~product of special Banach function lattices which inherit some lattice-geometric properties of the domain spaces, as order continuity and $p$-convexity. Factorization through Fremlin's tensor products is also analyzed. Applications are presented to study a~special class of linear operators between Banach function lattices that can be characterized by a strong version of $q$-concavity. This class contains $q$-dominated operators, and so the obtained results provide a~new factorization theorem for operators from this class.
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