arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2006.11151math.OC
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三阶对称张量的T-半正定性与T-半定规划

T-positive semidefiniteness of third-order symmetric tensors and T-semidefinite programming

Meng-Meng Zheng, Zheng-Hai Huang, Yong Wang

摘要:

三阶张量的T-积在文献中得到了广泛的应用。本文首先引入了具有张量积的多向量实值函数的一阶和二阶T-导数,并受二次连续T-可微多向量实值函数凸性的一个等价刻画的启发,给出了三阶对称张量的T-半正定性的定义.然后,我们将正半定矩阵的许多性质推广到三阶对称张量的情形。特别地,类似于广泛使用的半定规划(简称SDP),我们引入了三阶对称张量空间上的半定规划(简称T-semidefinite programming,简称TSDP),并将TSDP问题转化为复域上的半定规划问题来求解.此外,我们给出了几个例子,可以制定(或放松)的TSDP问题,并报告两个无约束多项式最优化问题的初步数值结果。实验结果表明,通过TSDP松弛算法寻找多项式的全局极小值的性能优于传统的SDP松弛算法。

英文摘要:

The T-product for third-order tensors has been used extensively in the literature. In this paper, we first introduce the first-order and second-order T-derivatives for the multi-vector real-valued function with the tensor T-product; and inspired by an equivalent characterization of a twice continuously T-differentiable multi-vector real-valued function being convex, we present a definition of the T-positive semidefiniteness of third-order symmetric tensors. After that, we extend many properties of positive semidefinite matrices to the case of third-order symmetric tensors. In particular, analogue to the widely used semidefinite programming (SDP for short), we introduce the semidefinite programming over the third-order symmetric tensor space (T-semidefinite programming or TSDP for short), and provide a way to solve the TSDP problem by converting it into an SDP problem in the complex domain. Furthermore, we give several examples which can be formulated (or relaxed) as TSDP problems, and report preliminary numerical results for two unconstrained polynomial optimization problems. Experiments show that finding the global minimums of polynomials via the TSDP relaxation outperforms the traditional SDP relaxation for the test examples.

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。

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