S DD2 tensors and B2-tensors
Keru Wen , Jiaqi Qi , Yaqiang Wang
Electronic Research Archive ›› 2025, Vol. 33 ›› Issue (4) : 2433 -2451.
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 S DD2 tensors, which are derived from S DD2 matrices and constitute a subclass of strong $\mathcal{H}$-tensors. Furthermore, we also investigate the relationships among S DD2 tensors, strong $\mathcal{H}$-tensors, S DD1 tensors and S DD tensors. Additionally, we extend the concept of S DD2 tensors to B-tensors, thereby defining a new tensor class called B2-tensors and analyzing their fundamental properties.
$\mathcal{H}$-tensor / S DD2 tensor / B2-tensor / real symmetric tensor / even-order homogeneous polynomial
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