QCD/conf5_4-8x8-15 graph

Matrix: QCD/conf5_4-8x8-15

Description: Quantum chromodynamics conf5.4-00l8x8-1500

  • UF Sparse Matrix Collection
  • Matrix group: QCD
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  • download as a MATLAB mat-file, file size: 11 MB. Use UFget(1600) or UFget('QCD/conf5_4-8x8-15') in MATLAB.
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    QCD/conf5_4-8x8-15

    dmperm of QCD/conf5_4-8x8-15

    Matrix properties
    number of rows49,152
    number of columns49,152
    nonzeros1,916,928
    structural full rank?yes
    structural rank49,152
    # of blocks from dmperm2
    # strongly connected comp.1
    entries not in dmperm blocks0
    explicit zero entries0
    nonzero pattern symmetry 92%
    numeric value symmetry 46%
    typecomplex
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorB. Medeke
    editorR. Boisvert, R. Pozo, K. Remington, B. Miller, R. Lipman, R. Barrett, J. Dongarra
    date1999
    kindtheoretical/quantum chemistry problem
    2D/3D problem?no

    Ordering statistics:AMD METIS DMPERM+
    nnz(chol(P*(A+A'+s*I)*P'))199,279,728 168,082,240 76,666,578
    Cholesky flop count2.3e+12 1.4e+12 3.0e+11
    nnz(L+U), no partial pivoting398,510,304 336,115,328 153,284,004
    nnz(V) for QR, upper bound nnz(L) for LU204,228,705 129,945,201 129,092,883
    nnz(R) for QR, upper bound nnz(U) for LU307,328,838 236,567,508 234,713,265

    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.