Matrix key: WEST0067 UMFPACK V5.1.0 (May 31, 2007), Control: Matrix entry defined as: double Int (generic integer) defined as: int 0: print level: 2 1: dense row parameter: 0.2 "dense" rows have > max (16, (0.2)*16*sqrt(n_col) entries) 2: dense column parameter: 0.2 "dense" columns have > max (16, (0.2)*16*sqrt(n_row) entries) 3: pivot tolerance: 0.1 4: block size for dense matrix kernels: 32 5: strategy: 0 (auto) 6: initial allocation ratio: 0.7 7: max iterative refinement steps: 2 12: 2-by-2 pivot tolerance: 0.01 13: Q fixed during numerical factorization: 0 (auto) 14: AMD dense row/col parameter: 10 "dense" rows/columns have > max (16, (10)*sqrt(n)) entries Only used if the AMD ordering is used. 15: diagonal pivot tolerance: 0.001 Only used if diagonal pivoting is attempted. 16: scaling: 1 (divide each row by sum of abs. values in each row) 17: frontal matrix allocation ratio: 0.5 18: drop tolerance: 0 19: AMD and COLAMD aggressive absorption: 1 (yes) The following options can only be changed at compile-time: 8: BLAS library used: Fortran BLAS. size of BLAS integer: 4 9: compiled for ANSI C 10: CPU timer is POSIX times ( ) routine. 11: compiled for normal operation (debugging disabled) computer/operating system: Linux size of int: 4 UF_long: 8 Int: 4 pointer: 8 double: 8 Entry: 8 (in bytes) symbolic analysis: status: 0. time: 0.00E+00 (sec) estimates (upper bound) for numeric LU: size of LU: 0.02 (MB) memory needed: 0.06 (MB) flop count: 0.14E+05 nnz (L): 542. nnz (U): 902. numeric factorization: status: 0. time: 0.00E+00 actual numeric LU statistics: size of LU: 0.01 (MB) memory needed: 0.04 (MB) flop count: 0.25E+04 nnz (L): 323. nnz (U): 339. UMFPACK V5.1.0 (May 31, 2007), Info: matrix entry defined as: double Int (generic integer) defined as: int BLAS library used: Fortran BLAS. size of BLAS integer: 4 MATLAB: no. CPU timer: POSIX times ( ) routine. number of rows in matrix A: 67 number of columns in matrix A: 67 entries in matrix A: 294 memory usage reported in: 8-byte Units size of int: 4 bytes size of UF_long: 8 bytes size of pointer: 8 bytes size of numerical entry: 8 bytes strategy used: unsymmetric ordering used: colamd on A modify Q during factorization: yes prefer diagonal pivoting: no pivots with zero Markowitz cost: 1 submatrix S after removing zero-cost pivots: number of "dense" rows: 0 number of "dense" columns: 0 number of empty rows: 0 number of empty columns 0 submatrix S not square or diagonal not preserved symbolic factorization defragmentations: 1 symbolic memory usage (Units): 1639 symbolic memory usage (MBytes): 0.0 Symbolic size (Units): 252 Symbolic size (MBytes): 0 symbolic factorization CPU time (sec): 0.00 symbolic factorization wallclock time(sec): 0.00 matrix scaled: yes (divided each row by sum of abs values in each row) minimum sum (abs (rows of A)): 1.00000e+00 maximum sum (abs (rows of A)): 6.59006e+00 symbolic/numeric factorization: upper bound actual % variable-sized part of Numeric object: initial size (Units) 1711 1577 92% peak size (Units) 6115 3581 59% final size (Units) 1628 682 42% Numeric final size (Units) 2108 1129 54% Numeric final size (MBytes) 0.0 0.0 54% peak memory usage (Units) 7476 4942 66% peak memory usage (MBytes) 0.1 0.0 66% numeric factorization flops 1.41920e+04 2.50100e+03 18% nz in L (incl diagonal) 542 323 60% nz in U (incl diagonal) 902 339 38% nz in L+U (incl diagonal) 1377 595 43% largest front (# entries) 483 80 17% largest # rows in front 21 10 48% largest # columns in front 23 11 48% initial allocation ratio used: 0.7 # of forced updates due to frontal growth: 0 nz in L (incl diagonal), if none dropped 323 nz in U (incl diagonal), if none dropped 339 number of small entries dropped 0 nonzeros on diagonal of U: 67 min abs. value on diagonal of U: 2.74e-02 max abs. value on diagonal of U: 2.28e+00 estimate of reciprocal of condition number: 1.20e-02 indices in compressed pattern: 263 numerical values stored in Numeric object: 599 numeric factorization defragmentations: 1 numeric factorization reallocations: 1 costly numeric factorization reallocations: 0 numeric factorization CPU time (sec): 0.00 numeric factorization wallclock time (sec): 0.00 solve flops: 1.19000e+03 iterative refinement steps taken: 0 iterative refinement steps attempted: 0 solve CPU time (sec): 0.00 solve wall clock time (sec): 0.00 total symbolic + numeric + solve flops: 3.69100e+03 norm (A*x-b): 0. norm (A*x-b): 0. norm (A*x-b): 0.