Matrix: QCD/conf6_0-8x8-80

Description: Quantum chromodynamics conf6.0-00l8x8-8000

QCD/conf6_0-8x8-80 graph QCD/conf6_0-8x8-80 graph
(bipartite graph drawing) (graph drawing of A+A')

QCD/conf6_0-8x8-80 dmperm of QCD/conf6_0-8x8-80

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  • Matrix group: QCD
  • Click here for a description of the QCD group.
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  • download as a MATLAB mat-file, file size: 11 MB. Use UFget(1604) or UFget('QCD/conf6_0-8x8-80') in MATLAB.
  • download in Matrix Market format, file size: 14 MB.
  • download in Rutherford/Boeing format, file size: 9 MB.

    Matrix properties
    number of rows49,152
    number of columns49,152
    structural full rank?yes
    structural rank49,152
    # of blocks from dmperm2
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetry 92%
    numeric value symmetry 46%
    Cholesky candidate?no
    positive definite?no

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

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD199,279,728
    Cholesky flop count2.3e+12
    nnz(L+U), no partial pivoting, with AMD398,510,304
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD204,228,705
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD307,328,838

    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.