Matrix: Boeing/msc10848

Description: SYMMETRIC TEST MATRIX FROM MSC/NASTRAN KNUCKLEF8.OUT2

Boeing/msc10848 graph
(undirected graph drawing)


Boeing/msc10848

  • Home page of the UF Sparse Matrix Collection
  • Matrix group: Boeing
  • Click here for a description of the Boeing group.
  • Click here for a list of all matrices
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  • download as a MATLAB mat-file, file size: 9 MB. Use UFget(361) or UFget('Boeing/msc10848') in MATLAB.
  • download in Matrix Market format, file size: 6 MB.
  • download in Rutherford/Boeing format, file size: 5 MB.

    Matrix properties
    number of rows10,848
    number of columns10,848
    nonzeros1,229,776
    structural full rank?yes
    structural rank10,848
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries2
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typereal
    structuresymmetric
    Cholesky candidate?yes
    positive definite?yes

    authorR. Grimes
    editorT. Davis
    date1995
    kindstructural problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD1,966,443
    Cholesky flop count5.3e+08
    nnz(L+U), no partial pivoting, with AMD3,922,038
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD4,959,219
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD12,305,436

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 2 explicit zero entries.

    SVD-based statistics:
    norm(A)6.29748e+11
    min(svd(A))63.1864
    cond(A)9.96652e+09
    rank(A)10,848
    sprank(A)-rank(A)0
    null space dimension0
    full numerical rank?yes

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

    Boeing/msc10848 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.