Oberwolfach/t2dal_e graph

Matrix: Oberwolfach/t2dal_e

Description: Oberwolfach: micropyros thruster, E matrix

  • UF Sparse Matrix Collection
  • Matrix group: Oberwolfach
  • Click here for a description of the Oberwolfach group.
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  • download as a MATLAB mat-file, file size: 25 KB. Use UFget(1207) or UFget('Oberwolfach/t2dal_e') in MATLAB.
  • download in Matrix Market format
  • download in Rutherford/Boeing format

    Oberwolfach/t2dal_e

    dmperm of Oberwolfach/t2dal_e

    Matrix properties
    number of rows4,257
    number of columns4,257
    nonzeros4,257
    structural full rank?yes
    structural rank4,257
    # of blocks from dmperm4,257
    # strongly connected comp.4,257
    entries not in dmperm blocks0
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typereal
    structuresymmetric
    Cholesky candidate?yes
    positive definite?yes

    authorE. Rudnyi
    editorE. Rudnyi
    date2004
    kindduplicate model reduction problem
    2D/3D problem?yes

    Ordering statistics:AMD METIS DMPERM+
    nnz(chol(P*(A+A'+s*I)*P'))4,257 4,257 4,257
    Cholesky flop count4.3e+03 4.3e+03 4.3e+03
    nnz(L+U), no partial pivoting4,257 4,257 4,257
    nnz(V) for QR, upper bound nnz(L) for LU4,257 4,257 4,257
    nnz(R) for QR, upper bound nnz(U) for LU4,257 4,257 4,257

    Maintained by Tim Davis, last updated 30-Sep-2008.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.