Matrix: Meszaros/model6

Description: linear programming problem, C. Meszaros test set

 (bipartite graph drawing)

• Matrix group: Meszaros
• download as a MATLAB mat-file, file size: 124 KB. Use UFget(1727) or UFget('Meszaros/model6') in MATLAB.

 Matrix properties number of rows 2,096 number of columns 5,289 nonzeros 27,628 structural full rank? no structural rank 2,094 # of blocks from dmperm 32 # strongly connected comp. 10 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 2004 kind linear programming problem 2D/3D problem? no

 Additional fields size and type b full 2096-by-1 c full 5289-by-1 lo full 5289-by-1 hi full 5289-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 1,145,170 nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD 123,262

 SVD-based statistics: norm(A) 1111.16 min(svd(A)) 5.36986e-18 cond(A) 2.06925e+20 rank(A) 2,094 sprank(A)-rank(A) 0 null space dimension 2 full numerical rank? no singular value gap 6.98209e+13

 singular values (MAT file): click here SVD method used: s = svd (full (A)) ; status: ok

Maintained by Tim Davis, last updated 12-Mar-2014.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.