Matrix: Lucifora/cell2
Description: Telecom Italia Mobile, GSM cell phone problem (cell2)
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| (bipartite graph drawing) | (graph drawing of A+A') |
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| Matrix properties | |
| number of rows | 7,055 |
| number of columns | 7,055 |
| nonzeros | 30,082 |
| # strongly connected comp. | 1 |
| explicit zero entries | 4,773 |
| nonzero pattern symmetry | 100% |
| numeric value symmetry | 0% |
| type | real |
| structure | unsymmetric |
| Cholesky candidate? | no |
| positive definite? | no |
| author | S. Lucifora |
| editor | T. Davis |
| date | 2003 |
| kind | directed weighted graph |
| 2D/3D problem? | no |
| Additional fields | size and type |
| b | full 7055-by-1 |
Note that all matrix statistics (except nonzero pattern symmetry) exclude the 4773 explicit zero entries.
| SVD-based statistics: | |
| norm(A) | 402.706 |
| min(svd(A)) | 3.6961e-15 |
| cond(A) | 1.08954e+17 |
| rank(A) | 7,054 |
| null space dimension | 1 |
| full numerical rank? | no |
| singular value gap | 6.19227e+13 |
| singular values (MAT file): | click here |
| SVD method used: | s = svd (full (A)) ; |
| status: | ok |
For a description of the statistics displayed above, click here.
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.