• SJSU Singular Matrix Database
  • 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


  • Matrix: Boeing/bcsstm38
  • Description: MASS MATRIX, AIRPLANE ENGINE COMPONENT
  • download as a MATLAB mat-file, file size: 68 KB. Use SJget(290) or SJget('Boeing/bcsstm38') in MATLAB.
  • download in Matrix Market format, file size: 57 KB.
  • download in Rutherford/Boeing format, file size: 58 KB.

    Boeing/bcsstm38

    Routine svd from Matlab 7.6.0.324 (R2008a) used to calculate the singular values.

    Boeing/bcsstm38

    dmperm of Boeing/bcsstm38

    scc of Boeing/bcsstm38

    Matrix properties (click for a legend)  
    number of rows8,032
    number of columns8,032
    structural full rank?no
    structural rank5,199
    numerical rank 5,112
    dimension of the numerical null space2,920
    numerical rank / min(size(A))0.63645
    Euclidean norm of A 541.1
    calculated singular value # 51124.7361e-008
    numerical rank defined using a tolerance
    max(size(A))*eps(norm(A)) =
    9.1313e-010
    calculated singular value # 51134.9681e-013
    gap in the singular values at the numerical rank:
    singular value # 5112 / singular value # 5113
    95331
    calculated condition numberInf
    condestInf
    nonzeros10,485
    # of blocks from dmperm3,825
    # strongly connected comp.6,656
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typereal
    structuresymmetric
    Cholesky candidate?yes
    positive definite?no

    authorR. Grimes
    editorT. Davis
    date1995
    kindstructural problem
    2D/3D problem?yes
    SJid290
    UFid348

    Ordering statistics:AMD METIS
    nnz(chol(P*(A+A'+s*I)*P'))10,771 10,771
    Cholesky flop count2.3e+004 2.3e+004
    nnz(L+U), no partial pivoting13,510 13,510
    nnz(V) for QR, upper bound nnz(L) for LU10,963 11,099
    nnz(R) for QR, upper bound nnz(U) for LU11,658 11,658

    Maintained by Leslie Foster, last updated 24-Apr-2009.

    Entries 5 through 14 in the table of matrix properties and the singular
    value plot were created using SJsingular code. The other plots
    and statistics are produced using utilities from the SuiteSparse package.
    Matrix color plot pictures by cspy, a MATLAB function in the CSparse package.