Matrix: Meszaros/ts-palko

Description: linear programming problem, C. Meszaros test set

 (bipartite graph drawing)

• Matrix group: Meszaros
• download as a MATLAB mat-file, file size: 3 MB. Use UFget(1815) or UFget('Meszaros/ts-palko') in MATLAB.

 Matrix properties number of rows 22,002 number of columns 47,235 nonzeros 1,076,903 structural full rank? yes structural rank 22,002 # of blocks from dmperm 1 # strongly connected comp. 1 explicit zero entries 0 nonzero pattern symmetry 0% numeric value symmetry 0% type real structure rectangular Cholesky candidate? no positive definite? no

 author editor C. Meszaros date 2006 kind linear programming problem 2D/3D problem? no

 Additional fields size and type b full 22002-by-1 c full 47235-by-1 lo full 47235-by-1 hi full 47235-by-1 z0 full 1-by-1

Notes:

```http://www.sztaki.hu/~meszaros/public_ftp/lptestset
Converted to standard form via Resende and Veiga's mpsrd:
minimize c'*x, subject to A*x=b and lo <= x <= hi
```

 Ordering statistics: result nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD 120,923,113 nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD 15,883,302

 SVD-based statistics: norm(A) 789.971 min(svd(A)) 3.69056 cond(A) 214.052 rank(A) 22,002 sprank(A)-rank(A) 0 null space dimension 0 full numerical rank? yes

 singular values (MAT file): click here SVD method used: s = svd (full (R)) ; where [~,R,E] = spqr (A') with droptol of zero status: ok