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

    Maintained by Tim Davis, last updated 01-Apr-2011.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.