Advances in Numerical Linear Algebra

The field of numerical linear algebra is witnessing significant advancements with the development of innovative methods and algorithms. Researchers are focusing on improving the efficiency and accuracy of existing techniques, particularly in areas such as matrix approximation, linear system solving, and eigenvalue decomposition. Notably, there is a growing interest in developing adaptive and robust methods that can handle complex problems, including those with non-Hermitian matrices and large-scale applications. The use of randomized techniques and data-sparse approximations is also becoming increasingly popular. These advancements have the potential to impact a wide range of applications, from image compression and reconstruction to numerical linear algebra problems. Noteworthy papers include: Error Estimates for the Arnoldi Approximation of a Matrix Square Root, which derives a priori error estimates for approximating the action of a matrix square root using the Arnoldi process. A Novel Adaptive Low-Rank Matrix Approximation Method for Image Compression and Reconstruction, which proposes an efficient orthogonal decomposition with automatic basis extraction to compute the optimal low-rank matrix approximation with adaptive identification of the optimal rank.

Sources

Error Estimates for the Arnoldi Approximation of a Matrix Square Root

A Novel Adaptive Low-Rank Matrix Approximation Method for Image Compression and Reconstruction

Minimal residual rational Krylov subspace method for sequences of shifted linear systems

An Optimal Least-Square Solver For Scaled Partial-Isometric Linear Systems

Numerical Linear Algebra in Linear Space

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