Matrix: Grund/b1_ss

Description: Unsymmetric Matrix b1_ss, F. Grund, Dec 1994.

Grund/b1_ss graph Grund/b1_ss graph
(bipartite graph drawing) (graph drawing of A+A')


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  • Matrix group: Grund
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  • download as a MATLAB mat-file, file size: 573 bytes. Use UFget(449) or UFget('Grund/b1_ss') in MATLAB.
  • download in Matrix Market format, file size: 523 bytes.
  • download in Rutherford/Boeing format, file size: 626 bytes.

    Matrix properties
    number of rows7
    number of columns7
    structural full rank?yes
    structural rank7
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    Cholesky candidate?no
    positive definite?no

    authorF. Grund
    editorF. Grund
    kindchemical process simulation problem
    2D/3D problem?no

    Additional fieldssize and type
    bfull 7-by-1

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD16
    Cholesky flop count4.0e+01
    nnz(L+U), no partial pivoting, with AMD25
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD15
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD19

    SVD-based statistics:
    null space dimension0
    full numerical rank?yes

    singular values (MAT file):click here
    SVD method used:s = svd (full (A))

    Grund/b1_ss svd

    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.