Matrix: Rajat/rajat11

Description: Rajat/rajat11 circuit simulation matrix

Rajat/rajat11 graph Rajat/rajat11 graph
(bipartite graph drawing) (graph drawing of A+A')


Rajat/rajat11 dmperm of Rajat/rajat11

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  • Matrix group: Rajat
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  • download as a MATLAB mat-file, file size: 4 KB. Use UFget(1195) or UFget('Rajat/rajat11') in MATLAB.
  • download in Matrix Market format, file size: 4 KB.
  • download in Rutherford/Boeing format, file size: 3 KB.

    Matrix properties
    number of rows135
    number of columns135
    nonzeros665
    structural full rank?yes
    structural rank135
    # of blocks from dmperm7
    # strongly connected comp.1
    explicit zero entries147
    nonzero pattern symmetry 89%
    numeric value symmetry 63%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorRajat
    editorT. Davis
    date2004
    kindcircuit simulation problem
    2D/3D problem?no

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD501
    Cholesky flop count1.9e+03
    nnz(L+U), no partial pivoting, with AMD867
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD702
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD1,588

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 147 explicit zero entries.

    SVD-based statistics:
    norm(A)15.0005
    min(svd(A))1.62535e-05
    cond(A)922910
    rank(A)135
    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

    Rajat/rajat11 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.