Matrix: Rajat/rajat26

Description: Rajat/rajat26 circuit simulation matrix

Rajat/rajat26 graph Rajat/rajat26 graph
(bipartite graph drawing) (graph drawing of A+A')

Rajat/rajat26 dmperm of Rajat/rajat26
scc of Rajat/rajat26

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  • Matrix group: Rajat
  • Click here for a description of the Rajat group.
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  • download as a MATLAB mat-file, file size: 1 MB. Use UFget(1375) or UFget('Rajat/rajat26') in MATLAB.
  • download in Matrix Market format, file size: 2 MB.
  • download in Rutherford/Boeing format, file size: 2 MB.

    Matrix properties
    number of rows51,032
    number of columns51,032
    structural full rank?yes
    structural rank51,032
    # of blocks from dmperm4,666
    # strongly connected comp.1,568
    explicit zero entries1,774
    nonzero pattern symmetry 99%
    numeric value symmetry 33%
    Cholesky candidate?no
    positive definite?no

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

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD200,495
    Cholesky flop count1.1e+06
    nnz(L+U), no partial pivoting, with AMD349,958
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD4,931,906
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD23,847,011

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 1774 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.