Matrix: Simon/bbmat

Description: BEAM + BAILEY 2D AIRFOIL EXACT JACOBIAN: MACH = 0.08, ANGLE = 2.0, TURB

Simon/bbmat graph Simon/bbmat graph
(bipartite graph drawing) (graph drawing of A+A')


Simon/bbmat

  • Home page of the UF Sparse Matrix Collection
  • Matrix group: Simon
  • Click here for a description of the Simon 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: 12 MB. Use UFget(812) or UFget('Simon/bbmat') in MATLAB.
  • download in Matrix Market format, file size: 18 MB.
  • download in Rutherford/Boeing format, file size: 15 MB.

    Matrix properties
    number of rows38,744
    number of columns38,744
    nonzeros1,771,722
    structural full rank?yes
    structural rank38,744
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetry 53%
    numeric value symmetry 0%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorH. Simon
    editorH. Simon
    date1993
    kindcomputational fluid dynamics problem
    2D/3D problem?yes

    Additional fieldssize and type
    bfull 38744-by-1
    xfull 38744-by-1

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD23,112,409
    Cholesky flop count2.2e+10
    nnz(L+U), no partial pivoting, with AMD46,186,074
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD23,041,854
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD44,250,239

    SVD-based statistics:
    norm(A)3992.38
    min(svd(A))7.35089e-06
    cond(A)5.43116e+08
    rank(A)38,744
    sprank(A)-rank(A)0
    null space dimension0
    full numerical rank?yes

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

    Simon/bbmat 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.