Matrix: GHS_indef/bmw3_2

Description: OUTPUT4-Matrix

GHS_indef/bmw3_2 graph
(undirected graph drawing)


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  • Matrix group: GHS_indef
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  • download as a MATLAB mat-file, file size: 69 MB. Use UFget(1219) or UFget('GHS_indef/bmw3_2') in MATLAB.
  • download in Matrix Market format, file size: 45 MB.
  • download in Rutherford/Boeing format, file size: 34 MB.

    Matrix properties
    number of rows227,362
    number of columns227,362
    structural full rank?yes
    structural rank227,362
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    Cholesky candidate?yes
    positive definite?no

    authorS. Mayer
    editorJ. Koster
    kindstructural problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD50,710,917
    Cholesky flop count4.7e+10
    nnz(L+U), no partial pivoting, with AMD101,194,472
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD140,879,463
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD271,743,447

    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.