Matrix: QCD/conf6_0-8x8-20

Description: Quantum chromodynamics conf6.0-00l8x8-2000

QCD/conf6_0-8x8-20 graph QCD/conf6_0-8x8-20 graph
(bipartite graph drawing) (graph drawing of A+A')

QCD/conf6_0-8x8-20 dmperm of QCD/conf6_0-8x8-20

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  • Matrix group: QCD
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  • download as a MATLAB mat-file, file size: 11 MB. Use UFget(1602) or UFget('QCD/conf6_0-8x8-20') 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
    nonzeros1,916,928
    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%
    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: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

    Maintained by Tim Davis, last updated 01-Apr-2011.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.