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arXiv 1901.04255math.NAcs.NA
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基于T-积的张量奇异值分解的广义张量函数

Generalized Tensor Function via the Tensor Singular Value Decomposition based on the T-Product

Yun Miao, Liqun Qi, Yimin Wei

摘要:

本文利用张量T-积的张量奇异值分解(T-SVD)给出了广义张量函数的定义。利用T-积给出了张量的紧奇异值分解(T-CSVD),并由此得到了张量的投影算子和Moore-Penrose逆.利用偏等距张量建立了张量的柯西积分公式,并将其应用于张量方程的求解。在此基础上,建立了广义张量的张量幂幂和泰勒展开式.还列出了显式广义张量函数。定义了张量双线性型和半双线性型,并给出了广义张量函数保持结构的定理。对于复张量,我们建立了复张量与实张量之间的同构。在本文的最后一部分,我们发现块循环算子建立了张量和矩阵之间的同构。利用这种同构证明了F-随机结构在广义张量函数下是不变的。提出了不变张量锥的概念。

英文摘要:

In this paper, we present the definition of generalized tensor function according to the tensor singular value decomposition (T-SVD) via the tensor T-product. Also, we introduce the compact singular value decomposition (T-CSVD) of tensors via the T-product, from which the projection operators and Moore Penrose inverse of tensors are also obtained. We also establish the Cauchy integral formula for tensors by using the partial isometry tensors and applied it into the solution of tensor equations. Then we establish the generalized tensor power and the Taylor expansion of tensors. Explicit generalized tensor functions are also listed. We define the tensor bilinear and sesquilinear forms and proposed theorems on structures preserved by generalized tensor functions. For complex tensors, we established an isomorphism between complex tensors and real tensors. In the last part of our paper, we find that the block circulant operator established an isomorphism between tensors and matrices. This isomorphism is used to prove the F-stochastic structure is invariant under generalized tensor functions. The concept of invariant tensor cones is also raised.

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