Matrix: PARSEC/Si87H76

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

PARSEC/Si87H76 graph
(undirected graph drawing)

PARSEC/Si87H76

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  • Matrix group: PARSEC
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  • download as a MATLAB mat-file, file size: 33 MB. Use UFget(1364) or UFget('PARSEC/Si87H76') in MATLAB.
  • download in Matrix Market format, file size: 33 MB.
  • download in Rutherford/Boeing format, file size: 22 MB.

    Matrix properties
    number of rows240,369
    number of columns240,369
    nonzeros10,661,631
    structural full rank?yes
    structural rank240,369
    # 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 AMD5,568,995,364
    Cholesky flop count2.1e+14
    nnz(L+U), no partial pivoting, with AMD11,137,750,359
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD5,569,318,576
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD9,458,297,640

    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.