• UF Sparse Matrix Collection
  • Matrix group: Bomhof
  • Click here for a description of the Bomhof group.
  • Click here for a list of all matrices
  • Click here for a list of all matrix groups

  • Matrix: Bomhof/circuit_3
  • Description: Circuit DAE with BDF method & Newton. W. Bomhof, Univ. Utrecht
  • download as a MATLAB mat-file, file size: 402 KB. Use UFget(372) or UFget('Bomhof/circuit_3') in MATLAB.
  • download in Matrix Market format
  • download in Rutherford/Boeing format

    Bomhof/circuit_3

    dmperm of Bomhof/circuit_3

    scc of Bomhof/circuit_3

    Bomhof/circuit_3 graph

    Matrix properties
    number of rows12,127
    number of columns12,127
    nonzeros48,137
    structural full rank?yes
    structural rank12,127
    # of blocks from dmperm4,521
    # strongly connected comp.4,399
    entries not in dmperm blocks9,593
    explicit zero entries0
    nonzero pattern symmetry 77%
    numeric value symmetry 30%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorW. Bomhof
    editorT. Davis
    date2000
    kindcircuit simulation problem
    2D/3D problem?no

    Additional fieldssize and type
    bfull 12127-by-1
    xfull 12127-by-1

    Ordering statistics:AMD METIS DMPERM+
    nnz(chol(P*(A+A'+s*I)*P'))43,501 46,712 43,033
    Cholesky flop count2.0e+05 2.5e+05 2.7e+05
    nnz(L+U), no partial pivoting74,875 81,297 83,532
    nnz(V) for QR, upper bound nnz(L) for LU797,936 994,338 48,378
    nnz(R) for QR, upper bound nnz(U) for LU2,982,471 3,592,206 94,682

    Maintained by Tim Davis, last updated 04-May-2008.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.