**Matrix: Pajek/patents_main**

Description: Pajek network: main NBER US Patent Citations, 1963-1999, cites 1975-1999

(bipartite graph drawing) | (graph drawing of A+A') |

Matrix properties | |

number of rows | 240,547 |

number of columns | 240,547 |

nonzeros | 560,943 |

# strongly connected comp. | 240,547 |

explicit zero entries | 0 |

nonzero pattern symmetry | 0% |

numeric value symmetry | 0% |

type | real |

structure | unsymmetric |

Cholesky candidate? | no |

positive definite? | no |

author | B. Hall, A. Jaffe, M. Tratjenberg |

editor | V. Batagelj |

date | 2001 |

kind | directed weighted graph |

2D/3D problem? | no |

Additional fields | size and type |

appyear | full 240547-by-1 |

cat | full 240547-by-1 |

class | full 240547-by-1 |

date | full 240547-by-1 |

subcat | full 240547-by-1 |

year | full 240547-by-1 |

country | full 240547-by-4 |

nodename | full 240547-by-7 |

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/. ------------------------------------------------------------------------------ Regarding conversion for UF sparse matrix collection: in the original data there are 561,060 weighted edges. Of this, 117 are duplicates, with identical edge weights. These extraneous edges have been removed in this version. Also, the original data has auxiliary data for all 6,009,554 US Patents in the time period. This patent network has only 240,547 patents, and the auxiliary data (appyear, class, etc.) is matched here to the nodes of the graph. ------------------------------------------------------------------------------

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.
*