Input matrix: 5-by- 5 with 14 entries Column: 1 number of entries: 2 with row indices in AI ( 1 ... 2) row indices: 1 2 Column: 2 number of entries: 4 with row indices in AI ( 3 ... 6) row indices: 1 2 3 5 Column: 3 number of entries: 4 with row indices in AI ( 7 ... 10) row indices: 2 3 4 5 Column: 4 number of entries: 2 with row indices in AI ( 11 ... 12) row indices: 3 4 Column: 5 number of entries: 2 with row indices in AI ( 13 ... 14) row indices: 2 5 amd: approximate minimum degree ordering, results: status: OK n, dimension of A: 5 nz, number of nonzeros in A: 14 symmetry of A: 0.8889 number of nonzeros on diagonal: 5 nonzeros in pattern of A+A' (excl. diagonal): 10 # dense rows/columns of A+A': 0 memory used, in bytes: 228 # of memory compactions: 0 The following approximate statistics are for a subsequent factorization of A(P,P) + A(P,P)'. They are slight upper bounds if there are no dense rows/columns in A+A', and become looser if dense rows/columns exist. nonzeros in L (excluding diagonal): 5 nonzeros in L (including diagonal): 10 # divide operations for LDL' or LU: 5 # multiply-subtract operations for LDL': 6 # multiply-subtract operations for LU: 7 max nz. in any column of L (incl. diagonal): 3 chol flop count for real A, sqrt counted as 1 flop: 22 LDL' flop count for real A: 17 LDL' flop count for complex A: 93 LU flop count for real A (with no pivoting): 19 LU flop count for complex A (with no pivoting): 101 PERM ( 1) = 1 PERM ( 2) = 4 PERM ( 3) = 3 PERM ( 4) = 5 PERM ( 5) = 2