Matrix: Rajat/rajat19

Description: Rajat/rajat19 circuit simulation matrix

Rajat/rajat19 graph Rajat/rajat19 graph
(bipartite graph drawing) (graph drawing of A+A')

Rajat/rajat19 dmperm of Rajat/rajat19
scc of Rajat/rajat19

  • Home page of the UF Sparse Matrix Collection
  • Matrix group: Rajat
  • Click here for a description of the Rajat group.
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  • download as a MATLAB mat-file, file size: 16 KB. Use UFget(1346) or UFget('Rajat/rajat19') in MATLAB.
  • download in Matrix Market format, file size: 23 KB.
  • download in Rutherford/Boeing format, file size: 19 KB.

    Matrix properties
    number of rows1,157
    number of columns1,157
    structural full rank?yes
    structural rank1,157
    # of blocks from dmperm734
    # strongly connected comp.166
    explicit zero entries1,700
    nonzero pattern symmetry 90%
    numeric value symmetry 92%
    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 AMD2,836
    Cholesky flop count7.5e+03
    nnz(L+U), no partial pivoting, with AMD4,515
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD23,069
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD55,406

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 1700 explicit zero entries.

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

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

    Rajat/rajat19 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.