Andrianov/lp1 graph

Matrix: Andrianov/lp1

Description: lp1 matrix from Alexander Andrianov, SAS Institute Inc.

  • UF Sparse Matrix Collection
  • Matrix group: Andrianov
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  • download as a MATLAB mat-file, file size: 3 MB. Use UFget(1383) or UFget('Andrianov/lp1') in MATLAB.
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    Andrianov/lp1

    Matrix properties
    number of rows534,388
    number of columns534,388
    nonzeros1,643,420
    structural full rank?yes
    structural rank534,388
    # of blocks from dmperm1
    # strongly connected comp.1
    entries not in dmperm blocks0
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typebinary
    structuresymmetric
    Cholesky candidate?yes
    positive definite?no

    authorA. Andrianov
    editorT. Davis
    date2006
    kindoptimization problem
    2D/3D problem?no

    Ordering statistics:AMD METIS
    nnz(chol(P*(A+A'+s*I)*P'))1,314,583 1,096,499
    Cholesky flop count3.6e+06 2.4e+06
    nnz(L+U), no partial pivoting2,094,778 1,658,610
    nnz(V) for QR, upper bound nnz(L) for LU1,133,319 -
    nnz(R) for QR, upper bound nnz(U) for LU3.116194e+10 -

    Maintained by Tim Davis, last updated 30-Sep-2008.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.