Matrix: Pajek/Erdos981
Description: Pajek network: Erdos collaboration network
| Matrix properties | |
| number of rows | 485 |
| number of columns | 485 |
| nonzeros | 2,762 |
| structural full rank? | no |
| structural rank | 427 |
| # of blocks from dmperm | 173 |
| # strongly connected comp. | 44 |
| explicit zero entries | 0 |
| nonzero pattern symmetry | symmetric |
| numeric value symmetry | symmetric |
| type | binary |
| structure | symmetric |
| Cholesky candidate? | no |
| positive definite? | no |
| author | J. Grossman, P. Iain, R. Castro |
| editor | V. Batagelj |
| date | 2006 |
| kind | undirected graph |
| 2D/3D problem? | no |
| Additional fields | size and type |
| nodename | full 485-by-33 |
Notes:
------------------------------------------------------------------------------ Pajek network converted to sparse adjacency matrix for inclusion in UF sparse matrix collection, Tim Davis. For Pajek datasets, See V. Batagelj & A. Mrvar, http://vlado.fmf.uni-lj.si/pub/networks/data/. ------------------------------------------------------------------------------
| Ordering statistics: | AMD | METIS |
| nnz(chol(P*(A+A'+s*I)*P')) | 4,746 | 5,432 |
| Cholesky flop count | 1.3e+05 | 1.7e+05 |
| nnz(L+U), no partial pivoting | 9,007 | 10,379 |
| nnz(V) for QR, upper bound nnz(L) for LU | 10,091 | 10,645 |
| nnz(R) for QR, upper bound nnz(U) for LU | 24,126 | 26,063 |
Maintained by Tim Davis, last updated 30-Sep-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.