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math.NA2026
A Fast Algorithm for Quaternion Tensor Singular Value Decomposition under the T-product
Daochang Zhang, Yue Zhao, Jingqian Li
Quaternion tensor singular value decomposition (T-SVD) under the T-product provides a framework for analyzing multidimensional quaternion data. However, the T-SVD construction of P…
math.NA2026
Perturbation Analysis of the QT-Drazin Inverse of Quaternion Tensors via the QT-Product
Yue Zhao, Daochang Zhang, Jingqian Li +1
The motivation of this paper is to investigate the perturbation theory for the QT-Drazin inverse of quaternion tensors under the QT-product via the associated -block circulant r…
math.NA2026
Block Diagonalization and Multiplicativity of Quaternion -Block Circulant Matrices with Applications
Daochang Zhang, Yue Zhao, Jingqian Li +1
The motivation of this paper is twofold. We firstly investigate the block-diagonalization of the -block circulant matrix , and develop the algorith…