Matrix: Rothberg/gearbox

Description: ZF aircraft flap actuator

Rothberg/gearbox graph
(undirected graph drawing)

Rothberg/gearbox dmperm of Rothberg/gearbox

  • Home page of the UF Sparse Matrix Collection
  • Matrix group: Rothberg
  • Click here for a description of the Rothberg group.
  • Click here for a list of all matrices
  • Click here for a list of all matrix groups
  • download as a MATLAB mat-file, file size: 3 MB. Use UFget(806) or UFget('Rothberg/gearbox') in MATLAB.
  • download in Matrix Market format, file size: 10 MB.
  • download in Rutherford/Boeing format, file size: 3 MB.

    Matrix properties
    number of rows153,746
    number of columns153,746
    structural full rank?yes
    structural rank153,746
    # of blocks from dmperm6
    # strongly connected comp.6
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    Cholesky candidate?yes
    positive definite?no

    authorE. Rothberg
    editorT. Davis
    kindstructural problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD48,554,746
    Cholesky flop count4.7e+10
    nnz(L+U), no partial pivoting, with AMD96,955,746
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD123,789,043
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD244,956,446

    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.