Matrix: HB/mbeacxc

Description: U NONSYMMETRIC MATRIX U.S. ECONOMY 1972 -SZYLD-I.E.A.-NYU-

HB/mbeacxc graph HB/mbeacxc graph
(bipartite graph drawing) (graph drawing of A+A')

HB/mbeacxc dmperm of HB/mbeacxc
scc of HB/mbeacxc

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  • Matrix group: HB
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  • download as a MATLAB mat-file, file size: 250 KB. Use UFget(209) or UFget('HB/mbeacxc') in MATLAB.
  • download in Matrix Market format, file size: 263 KB.
  • download in Rutherford/Boeing format, file size: 194 KB.

    Matrix properties
    number of rows496
    number of columns496
    nonzeros49,920
    structural full rank?no
    structural rank448
    # of blocks from dmperm10
    # strongly connected comp.54
    explicit zero entries0
    nonzero pattern symmetry 32%
    numeric value symmetry 0%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorD. Szyld
    editorI. Duff, R. Grimes, J. Lewis
    date1982
    kindeconomic problem
    2D/3D problem?no

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD75,909
    Cholesky flop count1.5e+07
    nnz(L+U), no partial pivoting, with AMD151,322
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD68,232
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD117,866

    SVD-based statistics:
    norm(A)1.69024
    min(svd(A))0
    cond(A)Inf
    rank(A)448
    sprank(A)-rank(A)0
    null space dimension48
    full numerical rank?no
    singular value gap1.5761e+09

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

    HB/mbeacxc 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.