Hohn/fd15 graph

Matrix: Hohn/fd15

Description: M. Hohn, Univ Utah. Single-material crack problem, finite diff log grid


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  • Matrix group: Hohn
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  • download as a MATLAB mat-file, file size: 120 KB. Use UFget(918) or UFget('Hohn/fd15') in MATLAB.
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    Hohn/fd15

    dmperm of Hohn/fd15

    Matrix properties
    number of rows11,532
    number of columns11,532
    nonzeros44,206
    structural full rank?yes
    structural rank11,532
    # of blocks from dmperm887
    # strongly connected comp.1
    entries not in dmperm blocks1,553
    explicit zero entries0
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorM. Hohn
    editorT. Davis
    date2003
    kindmaterials problem
    2D/3D problem?yes

    Additional fieldssize and type
    bfull 11532-by-1

    Ordering statistics:AMD METIS DMPERM+
    nnz(chol(P*(A+A'+s*I)*P'))4,048,671 6,473,316 394,752
    Cholesky flop count5.1e+09 9.6e+09 3.6e+07
    nnz(L+U), no partial pivoting8,085,810 12,935,100 779,525
    nnz(V) for QR, upper bound nnz(L) for LU453,719 421,618 409,249
    nnz(R) for QR, upper bound nnz(U) for LU885,744 830,534 787,033

    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.