Matrix: PARSEC/Ga41As41H72

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

PARSEC/Ga41As41H72 graph
(undirected graph drawing)


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  • Matrix group: PARSEC
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  • download as a MATLAB mat-file, file size: 93 MB. Use UFget(1353) or UFget('PARSEC/Ga41As41H72') in MATLAB.
  • download in Matrix Market format, file size: 81 MB.
  • download in Rutherford/Boeing format, file size: 62 MB.

    Matrix properties
    number of rows268,096
    number of columns268,096
    structural full rank?yes
    structural rank268,096
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    Cholesky candidate?yes
    positive definite?no

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

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD6,998,257,446
    Cholesky flop count3.1e+14
    nnz(L+U), no partial pivoting, with AMD13,996,246,796
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD6,609,437,846
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD11,332,818,530

    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.