Matrix: GHS_indef/dawson5

Description: FLAP, PART OF ACTUATOR SYSTEM ON AIRPLANE

GHS_indef/dawson5 graph
(undirected graph drawing)

GHS_indef/dawson5 dmperm of GHS_indef/dawson5

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  • Matrix group: GHS_indef
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  • download as a MATLAB mat-file, file size: 7 MB. Use UFget(1233) or UFget('GHS_indef/dawson5') in MATLAB.
  • download in Matrix Market format, file size: 6 MB.
  • download in Rutherford/Boeing format, file size: 5 MB.

    Matrix properties
    number of rows51,537
    number of columns51,537
    nonzeros1,010,777
    structural full rank?yes
    structural rank51,537
    # of blocks from dmperm307
    # strongly connected comp.307
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typereal
    structuresymmetric
    Cholesky candidate?no
    positive definite?no

    author
    editorN. Gould, Y. Hu, J. Scott
    date2004
    kindstructural problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD4,653,901
    Cholesky flop count1.2e+09
    nnz(L+U), no partial pivoting, with AMD9,256,265
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD9,424,509
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD17,693,148

    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.