Group Pothen

Group Description
Structrual engineering matrices from NASA, collected by Alex Pothen.
Each matrix has xy or xyz coordinates for each node (row/column) in the matrix.

These are all symmetric positive definite matrices.  Some have only their
nonzero patterns supplied.  The diagonal entries were not specified, so
for non-binary matrices they have been defined so that the diagonal A(i,i)
is equal to the sum of the absolute values of the off-diagonal entries in
row i, plus one.

The xy or xyz coordinates for each matrix are in seperate files.
For example, for the bodyy4.rsa matrix, the coordinates are in bodyy4.xyz.
Row i of the bodyy4.xyz file lists the xy or xyz coordinates of node i.
2D problems list just 2 values per line, 3D problems have 3 values per line.

Converted to Harwell/Boeing format by Tim Davis, January 2003.
Displaying collection matrices 1 - 20 of 22 in total
Id Name Group Rows Cols Nonzeros Kind Date Download File
874 mesh1em6 Pothen 48 48 306 Structural Problem 2003 MATLAB Rutherford Boeing Matrix Market
873 mesh1em1 Pothen 48 48 306 Structural Problem 2003 MATLAB Rutherford Boeing Matrix Market
872 mesh1e1 Pothen 48 48 306 Structural Problem 2003 MATLAB Rutherford Boeing Matrix Market
883 sphere2 Pothen 66 66 450 Structural Problem 2003 MATLAB Rutherford Boeing Matrix Market
878 mesh3em5 Pothen 289 289 1,377 Structural Problem 2003 MATLAB Rutherford Boeing Matrix Market
877 mesh3e1 Pothen 289 289 1,377 Structural Problem 2003 MATLAB Rutherford Boeing Matrix Market
884 sphere3 Pothen 258 258 1,794 Structural Problem 2003 MATLAB Rutherford Boeing Matrix Market
875 mesh2e1 Pothen 306 306 2,018 Structural Problem 2003 MATLAB Rutherford Boeing Matrix Market
876 mesh2em5 Pothen 306 306 2,018 Structural Problem 2003 MATLAB Rutherford Boeing Matrix Market
871 commanche_dual Pothen 7,920 7,920 31,680 Structural Problem 2003 MATLAB Rutherford Boeing Matrix Market
866 barth4 Pothen 6,019 6,019 40,965 Structural Problem 2003 MATLAB Rutherford Boeing Matrix Market
865 barth Pothen 6,691 6,691 46,187 Structural Problem 2003 MATLAB Rutherford Boeing Matrix Market
881 shuttle_eddy Pothen 10,429 10,429 103,599 Structural Problem 2003 MATLAB Rutherford Boeing Matrix Market
867 barth5 Pothen 15,606 15,606 107,362 Structural Problem 2003 MATLAB Rutherford Boeing Matrix Market
868 bodyy4 Pothen 17,546 17,546 121,550 Structural Problem 2003 MATLAB Rutherford Boeing Matrix Market
869 bodyy5 Pothen 18,589 18,589 128,853 Structural Problem 2003 MATLAB Rutherford Boeing Matrix Market
870 bodyy6 Pothen 19,366 19,366 134,208 Structural Problem 2003 MATLAB Rutherford Boeing Matrix Market
882 skirt Pothen 12,598 12,598 196,520 Structural Problem 2003 MATLAB Rutherford Boeing Matrix Market
886 tandem_vtx Pothen 18,454 18,454 253,350 Structural Problem 2003 MATLAB Rutherford Boeing Matrix Market
880 pwt Pothen 36,519 36,519 326,107 Structural Problem 2003 MATLAB Rutherford Boeing Matrix Market