Communications on Applied Mathematics and Computation ›› 2026, Vol. 8 ›› Issue (2): 472-489.doi: 10.1007/s42967-024-00451-5

• ORIGINAL PAPERS • Previous Articles     Next Articles

New Iterative Scheme-Based Strong ��-Tensors for Identifying the Positive Definiteness of Multivariate Homogeneous Forms

Pengcheng Zhao, Deshu Sun, Lanlan Liu   

  1. College of Data Science and Information Engineering, Guizhou Minzu University, Guiyang, 550025, Guizhou, China
  • Received:2024-05-04 Revised:2024-07-29 Online:2026-04-07 Published:2026-04-07
  • Contact: Pengcheng Zhao,E-mail:zpc13142022@163.com E-mail:zpc13142022@163.com
  • Supported by:
    This research is supported by Guizhou Provincial Science and Technology Projects, China (20191161), the Natural Science Research Project of Department of Education of Guizhou Province, China (QJJ2023012), and the Research Foundation of Guizhou Minzu University, China (GZMUZK[2023]YB10).

Abstract: The positive definite homogeneous multivariate form plays an important role in the automatic control and medical imaging, and the definiteness of this form can be identified by a special structure tensor. In this paper, we first state the equivalence between the positive definite multivariate form and the corresponding tensor and account for the links between the positive definite tensor with a strong \begin{document}$ \mathcal {H} $\end{document}-tensor. Then, based on diagonal dominance, some criteria are presented to test strong \begin{document}$ \mathcal {H} $\end{document}-tensors. Furthermore, with these relations, we provide an iterative scheme to identify the positive definite multivariate homogeneous form and prove its theoretically valid. The advantages of the results obtained are illustrated by numerical examples.

Key words: Homogeneous multivariate form, Positive definiteness, \begin{document}$ \mathcal {H} $\end{document}-tensor, Diagonal dominance, Irreducible, Non-zero element chain, Iterate scheme

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