HB/bcsstm01 graph

Matrix: HB/bcsstm01

Description: SYMMETRIC MASS MATRIX SMALL GENERALIZED EIGENVALUE PROBLEM, B MATRIX

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  • Matrix group: HB
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  • download as a MATLAB mat-file, file size: 621 bytes. Use UFget(56) or UFget('HB/bcsstm01') in MATLAB.
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    HB/bcsstm01

    dmperm of HB/bcsstm01

    scc of HB/bcsstm01

    Matrix properties
    number of rows48
    number of columns48
    nonzeros24
    structural full rank?no
    structural rank24
    # of blocks from dmperm26
    # strongly connected comp.48
    explicit zero entries24
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typeinteger
    structuresymmetric
    Cholesky candidate?no
    positive definite?no

    authorJ. Lewis
    editorI. Duff, R. Grimes, J. Lewis
    date1982
    kindstructural problem
    2D/3D problem?yes

    Ordering statistics:AMD METIS
    nnz(chol(P*(A+A'+s*I)*P'))48 48
    Cholesky flop count4.8e+01 4.8e+01
    nnz(L+U), no partial pivoting48 48
    nnz(V) for QR, upper bound nnz(L) for LU48 48
    nnz(R) for QR, upper bound nnz(U) for LU48 48

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 24 explicit zero entries.

    Maintained by Tim Davis, last updated 30-Sep-2008.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.