arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1111.2138math.NAcs.NA
收藏

求非负张量的谱半径

Finding the Spectral Radius of a Nonnegative Tensor

The Hong Kong Polytechnic University(香港理工大学);Tianjin University(天津大学)

Shenglong Hu, Zheng-Hai Huang, Liqun Qi

AI总结:

本文引入严格非负张量类,证明其谱半径恒正,并基于弱不可约性建立幂法的全局R线性收敛性,进而提出一种无需附加假设即可求一般非负张量谱半径的收敛算法。

摘要:

本文引入了一类新的非负张量——严格非负张量。弱不可约非负张量是严格非负张量,但反之不成立。我们证明了严格非负张量的谱半径总是正的。我们给出了文献中引入的六类条件良好的非负张量的一些充分必要条件,以及严格非负张量与这六类非负张量之间的完整关系图。然后,我们在弱不可约条件下建立了求非负张量谱半径的幂法的全局R线性收敛性。我们证明,对于非负张量T,总存在指标集的一个划分,使得由该划分诱导的每个张量都是弱不可约的;并且T的谱半径可以从这些诱导张量的谱半径得到。通过这种方式,我们开发了一种收敛算法,用于在没有任何附加假设的情况下求一般非负张量的谱半径。初步数值结果证明了所提算法的可行性和有效性。

英文摘要:

In this paper, we introduce a new class of nonnegative tensors --- strictly nonnegative tensors. A weakly irreducible nonnegative tensor is a strictly nonnegative tensor but not vice versa. We show that the spectral radius of a strictly nonnegative tensor is always positive. We give some sufficient and necessary conditions for the six well-conditional classes of nonnegative tensors, introduced in the literature, and a full relationship picture about strictly nonnegative tensors with these six classes of nonnegative tensors. We then establish global R-linear convergence of a power method for finding the spectral radius of a nonnegative tensor under the condition of weak irreducibility. We show that for a nonnegative tensor T, there always exists a partition of the index set such that every tensor induced by the partition is weakly irreducible; and the spectral radius of T can be obtained from those spectral radii of the induced tensors. In this way, we develop a convergent algorithm for finding the spectral radius of a general nonnegative tensor without any additional assumption. The preliminary numerical results demonstrate the feasibility and effectiveness of the proposed algorithm.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑