Matrix: Bai/pde2961

Description: MODEL PDE PROBLEM, H. ELMAN NX=47, NY=63

Bai/pde2961 graph
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  • download as a MATLAB mat-file, file size: 116 KB. Use UFget(324) or UFget('Bai/pde2961') in MATLAB.
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    Matrix properties
    number of rows2,961
    number of columns2,961
    structural full rank?yes
    structural rank2,961
    # 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 AMD42,520
    Cholesky flop count1.3e+06
    nnz(L+U), no partial pivoting, with AMD82,079
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD76,173
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD139,274

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

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

    Bai/pde2961 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.