Matrix: Pothen/mesh1em6

Description: mesh1em6, with coordinates. From NASA, collected by Alex Pothen

Pothen/mesh1em6 graph
(undirected graph drawing)


Pothen/mesh1em6
Pothen/mesh1em6 graph

  • Home page of the UF Sparse Matrix Collection
  • Matrix group: Pothen
  • Click here for a description of the Pothen 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 KB. Use UFget(874) or UFget('Pothen/mesh1em6') in MATLAB.
  • download in Matrix Market format, file size: 2 KB.
  • download in Rutherford/Boeing format, file size: 3 KB.

    Matrix properties
    number of rows48
    number of columns48
    nonzeros306
    structural full rank?yes
    structural rank48
    # 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

    authorNASA
    editorG. Kumfert, A. Pothen
    date2003
    kindstructural problem
    2D/3D problem?yes

    Additional fieldssize and type
    coordfull 48-by-2

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD336
    Cholesky flop count2.7e+03
    nnz(L+U), no partial pivoting, with AMD624
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD432
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD769

    SVD-based statistics:
    norm(A)7.20599
    min(svd(A))1.17965
    cond(A)6.10858
    rank(A)48
    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

    Pothen/mesh1em6 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.