Communications on Applied Mathematics and Computation ›› 2026, Vol. 8 ›› Issue (2): 605-621.doi: 10.1007/s42967-024-00461-3

• ORIGINAL PAPERS • Previous Articles     Next Articles

Randomized Algorithms for Computing the Generalized Tensor SVD Based on the Tensor Product

Salman Ahmadi-Asl1,2, Naeim Rezaeian2, Ugochukwu O. Ugwu3   

  1. 1. Lab of Machine Learning and Knowledge Representation, Innopolis University, Innopolis, 420500, Russia;
    2. Peoples' Friendship University of Russia, Moscow, 125009, Russia;
    3. Department of Mathematics, Colorado State University, Fort Collins, USA
  • Received:2024-02-10 Revised:2024-07-19 Online:2026-04-07 Published:2026-04-07
  • Contact: Salman Ahmadi-Asl,E-mail:salman.ahmadiasl@gmail.com E-mail:salman.ahmadiasl@gmail.com

Abstract: This work deals with developing two fast randomized algorithms for computing the generalized tensor singular value decomposition (GTSVD) based on the tensor product (T-product). The random projection method is utilized to compute the important actions of the underlying data tensors and use them to get small sketches of the original data tensors, which are easier to handle. Due to the small size of the tensor sketches, deterministic approaches are applied to them to compute their GTSVD. Then, from the GTSVD of the small tensor sketches, the GTSVD of the original large-scale data tensors is recovered. Some experiments are conducted to show the effectiveness of the proposed approach.

Key words: Randomized algorithms, Generalized tensor singular value decomposition (GTSVD), Tensor product (T-product)

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