Matrix: DNVS/m_t1

Description: DNV-Ex 1 : Tubular joint-1999-01-17

DNVS/m_t1 graph
(undirected graph drawing)

DNVS/m_t1

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  • Matrix group: DNVS
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  • download as a MATLAB mat-file, file size: 72 MB. Use UFget(1269) or UFget('DNVS/m_t1') in MATLAB.
  • download in Matrix Market format, file size: 57 MB.
  • download in Rutherford/Boeing format, file size: 47 MB.

    Matrix properties
    number of rows97,578
    number of columns97,578
    nonzeros9,753,570
    structural full rank?yes
    structural rank97,578
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typereal
    structuresymmetric
    Cholesky candidate?yes
    positive definite?yes

    authorC. Damhaug
    editorJ. Koster
    date1999
    kindstructural problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD32,991,606
    Cholesky flop count2.4e+10
    nnz(L+U), no partial pivoting, with AMD65,885,634
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD70,020,585
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD172,049,508

    Maintained by Tim Davis, last updated 01-Apr-2011.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.