Matrix: Hamm/add32

Description: 32-bit adder, from Steve Hamm (Motorola)

Hamm/add32 graph
(undirected graph drawing)


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  • Matrix group: Hamm
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  • download as a MATLAB mat-file, file size: 172 KB. Use UFget(540) or UFget('Hamm/add32') in MATLAB.
  • download in Matrix Market format, file size: 239 KB.
  • download in Rutherford/Boeing format, file size: 220 KB.

    Matrix properties
    number of rows4,960
    number of columns4,960
    structural full rank?yes
    structural rank4,960
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries4,036
    nonzero pattern symmetrysymmetric
    numeric value symmetry 31%
    Cholesky candidate?no
    positive definite?no

    authorS. Hamm
    editorT. Davis
    kindcircuit simulation problem
    2D/3D problem?no

    Additional fieldssize and type
    bfull 4960-by-1

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD14,377
    Cholesky flop count4.3e+04
    nnz(L+U), no partial pivoting, with AMD23,794
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD19,873
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD40,695

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 4036 explicit zero entries.

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

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

    Hamm/add32 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.