Matrix: Bai/pde900

Description: MODEL PDE PROBLEM, H. ELMAN NX = NY = 30

Bai/pde900 graph
(undirected graph drawing)


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  • Matrix group: Bai
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  • download as a MATLAB mat-file, file size: 35 KB. Use UFget(325) or UFget('Bai/pde900') in MATLAB.
  • download in Matrix Market format, file size: 38 KB.
  • download in Rutherford/Boeing format, file size: 37 KB.

    Matrix properties
    number of rows900
    number of columns900
    structural full rank?yes
    structural rank900
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetry 50%
    Cholesky candidate?no
    positive definite?no

    authorH. Elman
    editorZ. Bai, D. Day, J. Demmel, J. Dongarra
    kind2D/3D problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD10,231
    Cholesky flop count1.9e+05
    nnz(L+U), no partial pivoting, with AMD19,562
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD16,294
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD29,496

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

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

    Bai/pde900 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.