GitHub

UMFPACK: enforcing unsymmetric strategy with symmetric matrix may yield wrong results

Note: this is an experiment with UMFPACK_STRATEGY_UNSYMMETRIC, and may not be a bug, really. Tested on Ubuntu 22.04 and Ubuntu 23.04 with UMFPACK V5.7 (Oct 20, 2019) and UMFPACK V6.2 (Sept 18, 2023).
JSTOR Daily

On Rank Estimation in Symmetric Matrices: The Case of Indefinite Matrix Estimators

This is a preview. Log in through your library . Abstract In this paper we consider estimating the rank of an unknown symmetric matrix based on a symmetric, asymptotically normal estimator of the ...
Scientific Research Publishing

A Primal-Dual Simplex Algorithm for Solving Linear Programming Problems with Symmetric Trapezoidal Fuzzy Numbers ()

Two existing methods for solving a class of fuzzy linear programming (FLP) problems involving symmetric trapezoidal fuzzy numbers without converting them to crisp linear programming problems are the ...
JSTOR Daily

BLOCK-SYMMETRIC AND BLOCK-LOWER-TRIANGULAR PRECONDITIONERS FOR PDE-CONSTRAINED OPTIMIZATION PROBLEMS

Optimization problems with partial differential equations as constraints arise widely in many areas of science and engineering, in particular in problems of the design. The solution of such class of ...
IEEE

Matrix transformations for computing rightmost eigenvalues of large sparse non-symmetric eigenvalue problems

Abstract: This paper gives an overview of matrix transformations for finding rightmost eigenvalues of Ax = λx and Ax = λBx with A and B real non-symmetric and B possibly singular. The aim is not to ...