Matrix: PARSEC/CO

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

PARSEC/CO graph
(undirected graph drawing)


PARSEC/CO

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  • Matrix group: PARSEC
  • Click here for a description of the PARSEC group.
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  • download as a MATLAB mat-file, file size: 13 MB. Use UFget(1349) or UFget('PARSEC/CO') in MATLAB.
  • download in Matrix Market format, file size: 17 MB.
  • download in Rutherford/Boeing format, file size: 9 MB.

    Matrix properties
    number of rows221,119
    number of columns221,119
    nonzeros7,666,057
    structural full rank?yes
    structural rank221,119
    # 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 AMD5,034,289,125
    Cholesky flop count1.9e+14
    nnz(L+U), no partial pivoting, with AMD10,068,357,131
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD5,167,064,035
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD8,716,233,055

    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.