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(s, ln(k))-weak tractability of linear problems

机译:(s,ln(k))-线性问题的弱可处理性

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摘要

We introduce a new notion of tractability for multivariate problems, namely (s, ln(K))-weak tractability for positive s and K. This allows us to study the information complexity of a d-variate problem with respect to different powers of d and the bits of accuracy Ins epsilon(-1). We consider the worst case error for the absolute and normalized error criteria. We provide necessary and sufficient conditions for (s, ln(K)) -weak tractability for general linear problems and linear tensor product problems defined over Hilbert spaces. In particular, we show that non-trivial linear tensor product problems cannot be (s, ln(K))-weakly tractable when s is an element of (0, 1] and K is an element of (0, 1]. On the other hand, they are (s, ln(K)) -weakly tractable for K > I and s > 1 if the univariate eigenvalues of the linear tensor product problem enjoy a polynomial decay. Finally, we study (s, ln(K)) -weak tractability for the remaining combinations of the values of s and K. (C) 2016 Elsevier Inc. All rights reserved.
机译:我们引入了针对多元问题的易处理性的新概念,即对于正数s和K的(s,ln(K))-弱易处理性。这使我们能够研究d变量关于d的不同次幂的信息复杂性和精度位Ins epsilon(-1)。对于绝对误差和标准化误差准则,我们考虑最坏情况的误差。我们为Hilbert空间上定义的一般线性问题和线性张量积问题的(s,ln(K))-弱可伸缩性提供了充要条件。特别地,我们证明了当s是(0,1]的元素并且K是(0,1]的元素时,非平凡线性张量积问题不可能(s,ln(K))弱可处理。另一方面,如果线性张量积问题的单变量特征值具有多项式衰减,则对于(s,ln(K))-对于K> I和s> 1,它们是弱易处理的。最后,我们研究(s,ln(K ))-s和K的其余值组合的易处理性。(C)2016 Elsevier Inc.保留所有权利。

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