**Matrix: Pajek/HEP-th-new**

Description: Pajek network: High Energy Physics literature

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

Matrix properties | |

number of rows | 27,770 |

number of columns | 27,770 |

nonzeros | 352,807 |

# strongly connected comp. | 20,086 |

explicit zero entries | 0 |

nonzero pattern symmetry | 0% |

numeric value symmetry | 0% |

type | binary |

structure | unsymmetric |

Cholesky candidate? | no |

positive definite? | no |

author | KDD Cup 2003 |

editor | V. Batagelj |

date | 2003 |

kind | directed graph |

2D/3D problem? | no |

Additional fields | size and type |

year | full 27770-by-1 |

date | full 27770-by-1 |

nodename | full 27770-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/. ------------------------------------------------------------------------------ High Energy Particle Physics (HEP) literature with May 12, 2003 Update ---------------------------------------------------------------------- Citation data from KDD Cup 2003, a knowledge discovery and data mining competition held in conjunction with the Ninth Annual ACM SIGKDD Conference. http://www.cs.cornell.edu/projects/kddcup/index.html The Stanford Linear Accelerator Center SPIRES-HEP database has been comprehensively cataloguing the High Energy Particle Physics (HEP) literature online since 1974, and indexes more than 500,000 high-energy physics related articles including their full citation tree. The network contains a citation graph of the hep-th portion of the arXiv. The units names are the arXiv IDs of papers; the relation is X cites Y . Note that revised papers may have updated citations. As such, citations may refer to future papers, i.e. a paper may cite another paper that was publishe after the first paper. transformed in Pajek format: V. Batagelj, 26. July 2003 year: The SLAC/SPIRES dates for all hep-th papers are given. Some older papers were uploaded years after their intial publication and the arXiv submission date from the abstracts may not correspond to the publication date. An alternative date has been provided from SLAC/SPIRES that may be a better estimate for the initial publication of these old papers. The vector contains the year in SLAC date of each paper. date: SLAC date of paper was transformed to the number of days since August 1, 1991

SVD-based statistics: | |

norm(A) | 85.1607 |

min(svd(A)) | 6.73444e-66 |

cond(A) | 1.26456e+67 |

rank(A) | 21,616 |

null space dimension | 6,154 |

full numerical rank? | no |

singular value gap | 3.66194e+08 |

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.
*