Matrix: Rost/RFdevice

Description: semiconductor device simulation, Johann Rost, Politehnia Univ., Bucharest

Rost/RFdevice graph Rost/RFdevice graph
(bipartite graph drawing) (graph drawing of A+A')

Rost/RFdevice dmperm of Rost/RFdevice

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  • download as a MATLAB mat-file, file size: 1 MB. Use UFget(1877) or UFget('Rost/RFdevice') in MATLAB.
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    Matrix properties
    number of rows74,104
    number of columns74,104
    structural full rank?yes
    structural rank74,104
    # of blocks from dmperm114
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    Cholesky candidate?no
    positive definite?no

    authorJ. Rost
    editorT. Davis
    kindsemiconductor device problem
    2D/3D problem?yes

    Additional fieldssize and type
    bsparse 74104-by-9


    Numerical Methods Laboratory, Politehnica Univ., Bucharest, Romania.   
    Johann Rost, et al.  RF semiconductors and electronic device simulation
    in the frequency domain.  UMFPACK (x=A\b in MATLAB) experiences high   
    fill-in for this matrix.  KLU is worse.                                

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD774,731,752
    Cholesky flop count2.0e+13
    nnz(L+U), no partial pivoting, with AMD1,549,389,400
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD55,696,430
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD98,106,749

    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.