Matrix: Rajat/rajat28

Description: Rajat/rajat28 circuit simulation matrix

Rajat/rajat28 graph Rajat/rajat28 graph
(bipartite graph drawing) (graph drawing of A+A')

Rajat/rajat28 dmperm of Rajat/rajat28
scc of Rajat/rajat28

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  • Matrix group: Rajat
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  • download as a MATLAB mat-file, file size: 3 MB. Use UFget(1377) or UFget('Rajat/rajat28') in MATLAB.
  • download in Matrix Market format, file size: 4 MB.
  • download in Rutherford/Boeing format, file size: 3 MB.

    Matrix properties
    number of rows87,190
    number of columns87,190
    nonzeros606,489
    structural full rank?yes
    structural rank87,190
    # of blocks from dmperm3,495
    # strongly connected comp.1,178
    explicit zero entries746
    nonzero pattern symmetry 99%
    numeric value symmetry 11%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorRajat
    editorT. Davis
    date2006
    kindcircuit simulation problem
    2D/3D problem?no

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD1,137,954
    Cholesky flop count3.0e+08
    nnz(L+U), no partial pivoting, with AMD2,188,718
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD612,314,621
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD1,261,079,638

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 746 explicit zero entries.

    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.