Matrix: PARSEC/Si41Ge41H72

Description: Real-space pseudopotential method. Zhou, Saad, Tiago, Chelikowsky, Univ MN

PARSEC/Si41Ge41H72 graph
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PARSEC/Si41Ge41H72

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  • Matrix group: PARSEC
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  • download as a MATLAB mat-file, file size: 83 MB. Use UFget(1362) or UFget('PARSEC/Si41Ge41H72') in MATLAB.
  • download in Matrix Market format, file size: 70 MB.
  • download in Rutherford/Boeing format, file size: 55 MB.

    Matrix properties
    number of rows185,639
    number of columns185,639
    nonzeros15,011,265
    structural full rank?yes
    structural rank185,639
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typereal
    structuresymmetric
    Cholesky candidate?yes
    positive definite?no

    authorY. Zhou, Y. Saad, M. Tiago, J. Chelikowsky
    editorT. Davis
    date2005
    kindtheoretical/quantum chemistry problem
    2D/3D problem?no

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD3,457,063,398
    Cholesky flop count1.1e+14
    nnz(L+U), no partial pivoting, with AMD6,913,941,157
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD4,225,841,705
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD6,941,211,642

    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.