Matrix: Chen/pkustk02

Description: PKU SYMMETRIC STIFFNESS, FEIYUE BUILDING

Chen/pkustk02 graph
(undirected graph drawing)


Chen/pkustk02

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  • Matrix group: Chen
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  • download as a MATLAB mat-file, file size: 237 KB. Use UFget(848) or UFget('Chen/pkustk02') in MATLAB.
  • download in Matrix Market format, file size: 868 KB.
  • download in Rutherford/Boeing format, file size: 190 KB.

    Matrix properties
    number of rows10,800
    number of columns10,800
    nonzeros810,000
    structural full rank?yes
    structural rank10,800
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typebinary
    structuresymmetric
    Cholesky candidate?yes
    positive definite?no

    authorP. Chen
    editorT. Davis
    date2002
    kindstructural problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD1,283,724
    Cholesky flop count2.6e+08
    nnz(L+U), no partial pivoting, with AMD2,556,648
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD3,536,244
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD8,352,504

    SVD-based statistics:
    norm(A)105.239
    min(svd(A))0
    cond(A)Inf
    rank(A)1,224
    sprank(A)-rank(A)9,576
    null space dimension9,576
    full numerical rank?no
    singular value gap1.26425e+09

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

    Chen/pkustk02 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.