underdetermined system from ANSYS
Name Delor295K
Matrix ID 2652
Num Rows 295,734
Num Cols 1,823,928
Nonzeros 2,401,323
Pattern Entries 2,401,323
Kind Least Squares Problem
Symmetric No
Date 2011
Author E. Delor
Editor T. Davis
Structural Rank 295,734
Structural Rank Full true
Num Dmperm Blocks 1
Strongly Connect Components 1,403,811
Num Explicit Zeros 0
Pattern Symmetry 0%
Numeric Symmetry 0%
Cholesky Candidate no
Positive Definite no
Type real
Download MATLAB Rutherford Boeing Matrix Market
Goal is to find a permutation or factorization        
that places A in upper trapezoidal form, [R1 R2] where
R1 is well-conditioned, square, and upper triangular, 
and where R1\R2 is as sparse as possible.