Matrix: JGD_Franz/Franz7

Description: Cohomology of various rings, from Matthias Franz, Univ. Konstanz, Germany

JGD_Franz/Franz7 graph
(bipartite graph drawing)

scc of JGD_Franz/Franz7

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  • download as a MATLAB mat-file, file size: 74 KB. Use UFget(1960) or UFget('JGD_Franz/Franz7') in MATLAB.
  • download in Matrix Market format, file size: 108 KB.
  • download in Rutherford/Boeing format, file size: 103 KB.

    Matrix properties
    number of rows10,164
    number of columns1,740
    structural full rank?yes
    structural rank1,740
    # of blocks from dmperm1
    # strongly connected comp.6
    explicit zero entries0
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    Cholesky candidate?no
    positive definite?no

    authorM. Franz
    editorJ.-G. Dumas
    kindcombinatorial problem
    2D/3D problem?no


    Cohomology of various rings, from Matthias Franz, Univ. Konstanz, Germany
    From Jean-Guillaume Dumas' Sparse Integer Matrix Collection,                        
    Filename in JGD collection: Franz/10164x1740                             

    Ordering statistics:result
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD7,072,949
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD518,487

    SVD-based statistics:
    null space dimension113
    full numerical rank?no
    singular value gap7.43243e+12

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

    JGD_Franz/Franz7 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.