Matrix: Lee/fem_hifreq_circuit

Description: FEM, Maxwell's eqns for hi-freq. circuit, C. for Electromag., UIUC

Lee/fem_hifreq_circuit graph Lee/fem_hifreq_circuit graph
(bipartite graph drawing) (graph drawing of A+A')


  • Home page of the UF Sparse Matrix Collection
  • Matrix group: Lee
  • Click here for a description of the Lee 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: 152 MB. Use UFget(2246) or UFget('Lee/fem_hifreq_circuit') in MATLAB.
  • download in Matrix Market format, file size: 229 MB.
  • download in Rutherford/Boeing format, file size: 229 MB.

    Matrix properties
    number of rows491,100
    number of columns491,100
    structural full rank?yes
    structural rank491,100
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetry 100%
    numeric value symmetry 50%
    Cholesky candidate?no
    positive definite?no

    authorS.-H. Lee
    editorT. Davis
    kindelectromagnetics problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD372,855,896
    Cholesky flop count1.0e+12
    nnz(L+U), no partial pivoting, with AMD745,220,692
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD984,668,177
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD2,366,434,968

    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.