Matrix: Boeing/bcsstk38

Description: STIFFNESS MATRIX, AIRPLANE ENGINE COMPONENT

Boeing/bcsstk38 graph
(undirected graph drawing)


Boeing/bcsstk38

  • Home page of the UF Sparse Matrix Collection
  • Matrix group: Boeing
  • Click here for a description of the Boeing 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: 2 MB. Use UFget(343) or UFget('Boeing/bcsstk38') in MATLAB.
  • download in Matrix Market format, file size: 1 MB.
  • download in Rutherford/Boeing format, file size: 1 MB.

    Matrix properties
    number of rows8,032
    number of columns8,032
    nonzeros355,460
    structural full rank?yes
    structural rank8,032
    # 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

    authorR. Grimes
    editorT. Davis
    date1995
    kindstructural problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD736,620
    Cholesky flop count1.2e+08
    nnz(L+U), no partial pivoting, with AMD1,465,208
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD1,467,968
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD3,072,801

    SVD-based statistics:
    norm(A)4.04231e+11
    min(svd(A))7.32751e-06
    cond(A)5.51661e+16
    rank(A)8,008
    sprank(A)-rank(A)24
    null space dimension24
    full numerical rank?no
    singular value gap1.28486

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

    Boeing/bcsstk38 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.