Matrix: Wang/wang2

Description: Discretized electron continuity, 3d diode, nonuniform 14-14-16 mesh

Wang/wang2 graph
(undirected graph drawing)


Wang/wang2

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  • Matrix group: Wang
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  • download as a MATLAB mat-file, file size: 88 KB. Use UFget(831) or UFget('Wang/wang2') in MATLAB.
  • download in Matrix Market format, file size: 95 KB.
  • download in Rutherford/Boeing format, file size: 79 KB.

    Matrix properties
    number of rows2,903
    number of columns2,903
    nonzeros19,093
    structural full rank?yes
    structural rank2,903
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetry 81%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorS. Wang
    editorT. Davis
    date1994
    kindsubsequent semiconductor device problem
    2D/3D problem?yes

    Notes:

    next: - first: Wang/wang1
    

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD166,721
    Cholesky flop count2.7e+07
    nnz(L+U), no partial pivoting, with AMD330,539
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD330,098
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD590,936

    SVD-based statistics:
    norm(A)4.13808
    min(svd(A))0.000179484
    cond(A)23055.4
    rank(A)2,903
    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

    Wang/wang2 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.