Matrix: Hamrle/Hamrle3

Description: Hamrle/Hamrle3 circuit simulation matrix

Hamrle/Hamrle3 graph Hamrle/Hamrle3 graph
(bipartite graph drawing) (graph drawing of A+A')


  • Home page of the UF Sparse Matrix Collection
  • Matrix group: Hamrle
  • Click here for a description of the Hamrle group.
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  • download as a MATLAB mat-file, file size: 9 MB. Use UFget(1201) or UFget('Hamrle/Hamrle3') in MATLAB.
  • download in Matrix Market format, file size: 21 MB.
  • download in Rutherford/Boeing format, file size: 13 MB.

    Matrix properties
    number of rows1,447,360
    number of columns1,447,360
    structural full rank?yes
    structural rank1,447,360
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    Cholesky candidate?no
    positive definite?no

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

    Additional fieldssize and type
    bsparse 1447360-by-1

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD110,754,153,276
    Cholesky flop count3.4e+16
    nnz(L+U), no partial pivoting, with AMD221,506,859,192
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD224,148,531
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD424,510,308

    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.