Strong $ \mathcal{H} $-tensors have many important applications in practical problems. In particular, strong $ \mathcal{H} $-tensors play an important role in the positive qualitative determination of multivariate even-order homogeneous polynomials. Therefore, research in this field is of great theoretical and practical value. This paper focuses on introducing a novel class of tensors, termed $ SDD_2 $ tensors, which are derived from $ SDD_2 $ matrices and constitute a subclass of strong $ \mathcal{H} $-tensors. Furthermore, we also investigate the relationships among $ SDD_2 $ tensors, strong $ \mathcal{H} $-tensors, $ SDD_1 $ tensors and $ SDD $ tensors. Additionally, we extend the concept of $ SDD_2 $ tensors to $ B $-tensors, thereby defining a new tensor class called $ B_2 $-tensors and analyzing their fundamental properties.
Citation: Keru Wen, Jiaqi Qi, Yaqiang Wang. $ SDD_2 $ tensors and $ B_2 $-tensors[J]. Electronic Research Archive, 2025, 33(4): 2433-2451. doi: 10.3934/era.2025108
Strong $ \mathcal{H} $-tensors have many important applications in practical problems. In particular, strong $ \mathcal{H} $-tensors play an important role in the positive qualitative determination of multivariate even-order homogeneous polynomials. Therefore, research in this field is of great theoretical and practical value. This paper focuses on introducing a novel class of tensors, termed $ SDD_2 $ tensors, which are derived from $ SDD_2 $ matrices and constitute a subclass of strong $ \mathcal{H} $-tensors. Furthermore, we also investigate the relationships among $ SDD_2 $ tensors, strong $ \mathcal{H} $-tensors, $ SDD_1 $ tensors and $ SDD $ tensors. Additionally, we extend the concept of $ SDD_2 $ tensors to $ B $-tensors, thereby defining a new tensor class called $ B_2 $-tensors and analyzing their fundamental properties.
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