Matrix: Rajat/rajat31

Description: Rajat/rajat31 circuit simulation matrix

Rajat/rajat31 graph
(undirected graph drawing)

Rajat/rajat31 dmperm of Rajat/rajat31

  • Home page of the UF Sparse Matrix Collection
  • Matrix group: Rajat
  • Click here for a description of the Rajat group.
  • Click here for a list of all matrices
  • Click here for a list of all matrix groups
  • download as a MATLAB mat-file, file size: 40 MB. Use UFget(1398) or UFget('Rajat/rajat31') in MATLAB.
  • download in Matrix Market format, file size: 79 MB.
  • download in Rutherford/Boeing format, file size: 48 MB.

    Matrix properties
    number of rows4,690,002
    number of columns4,690,002
    nonzeros20,316,253
    structural full rank?yes
    structural rank4,690,002
    # of blocks from dmperm2,503
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetry 40%
    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 AMD230,020,419
    Cholesky flop count3.0e+11
    nnz(L+U), no partial pivoting, with AMD455,350,836
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD275,198,290
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD501,011,362

    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.