Matrix: Hamrle/Hamrle1

Description: Hamrle/Hamrle1 circuit simulation matrix

Hamrle/Hamrle1 graph Hamrle/Hamrle1 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: 833 bytes. Use UFget(1199) or UFget('Hamrle/Hamrle1') in MATLAB.
  • download in Matrix Market format, file size: 912 bytes.
  • download in Rutherford/Boeing format, file size: 992 bytes.

    Matrix properties
    number of rows32
    number of columns32
    structural full rank?yes
    structural rank32
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetry 6%
    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 32-by-1

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD231
    Cholesky flop count2.0e+03
    nnz(L+U), no partial pivoting, with AMD430
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD98
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD176

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

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

    Hamrle/Hamrle1 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.