The study of randomized iterative methods for matrix-vector and matrix-matrix regression encompasses a rich body of literature. However, the study of such methods for tensor regression is still in its infancy. Our new work spans three different areas within the iterative method literature: methods for systems with factorized measurement operators, column-action methods, and methods for systems with adversarially corrupted measurements. In particular, we extend variants of the Kaczmarz and Gauss-Seidel methods to tensor regression under the t-product, which also yields novel insights into the standard matrix-vector and matrix-matrix regression settings. In addition, we survey the related work in the matrix-vector and tensor regression literature. We provide a suite of numerical experiments that illustrate the strengths and weaknesses of our proposed methods and demonstrate their application to image deblurring.

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Randomized Iterative Methods for Tensor Regression Under the t-Product

  • Alejandra Castillo,
  • Jamie Haddock,
  • Iryna Hartsock,
  • Paulina Hoyos,
  • Lara Kassab,
  • Alona Kryshchenko,
  • Kamila Larripa,
  • Deanna Needell,
  • Shambhavi Suryanarayanan,
  • Karamatou Yacoubou Djima

摘要

The study of randomized iterative methods for matrix-vector and matrix-matrix regression encompasses a rich body of literature. However, the study of such methods for tensor regression is still in its infancy. Our new work spans three different areas within the iterative method literature: methods for systems with factorized measurement operators, column-action methods, and methods for systems with adversarially corrupted measurements. In particular, we extend variants of the Kaczmarz and Gauss-Seidel methods to tensor regression under the t-product, which also yields novel insights into the standard matrix-vector and matrix-matrix regression settings. In addition, we survey the related work in the matrix-vector and tensor regression literature. We provide a suite of numerical experiments that illustrate the strengths and weaknesses of our proposed methods and demonstrate their application to image deblurring.