My demo Date from #include 'my.h': Mar 22, 2024 Date from compiled library: Mar 22, 2024 version from #include 'my.h.': 1.7.0 version from compiled library: 1.7.0 ------------------------------------------------------------ MY: v1.7.0 (Mar 22, 2024) MY: v1.7.0 (in library) MY version code: 1007000 MY date: Mar 22, 2024 ------------------------------------------------------------ SuiteSparse_config: v7.7.0 (Mar 22, 2024) SuiteSparse_config: v7.7.0 (in library) SuiteSparse_config version code: 7007000 ------------------------------------------------------------ CXSparse: v4.4.0 (Mar 22, 2024) CXSparse: v4.4.0 (in library) CXSparse version code: 4004000 CXSparse Version 4.4.0, Mar 22, 2024. Copyright (c) Timothy A. Davis, 2006-2024 2-by-2, nzmax: 4 nnz: 4, 1-norm: 34 col 0 : locations 0 to 1 0 : 11 1 : 21 col 1 : locations 2 to 3 0 : 12 1 : 22 ------------------------------------------------------------ AMD: v3.3.2 (Mar 22, 2024) AMD: v3.3.2 (in library) AMD version code: 3003002 P [0] = 0 P [1] = 1 ------------------------------------------------------------ BTF: v2.3.2 (Mar 22, 2024) BTF: v2.3.2 (in library) BTF version code: 2003002 P [0] = 0 P [1] = 1 Q [0] = 0 Q [1] = 1 nblocks 1 ------------------------------------------------------------ CAMD: v3.3.2 (Mar 22, 2024) CAMD: v3.3.2 (in library) CAMD version code: 3003002 P [0] = 0 P [1] = 1 ------------------------------------------------------------ CCOLAMD: v3.3.3 (Mar 22, 2024) CCOLAMD: v3.3.3 (in library) CCOLAMD version code: 3003003 P [0] = 0 P [1] = 1 ------------------------------------------------------------ COLAMD: v3.3.3 (Mar 22, 2024) COLAMD: v3.3.3 (in library) COLAMD version code: 3003003 P [0] = 0 P [1] = 1 ------------------------------------------------------------ CHOLMOD: v5.2.1 (Mar 22, 2024) CHOLMOD: v5.2.1 (in library) CHOLMOD version code: 5002001 ------------------------------------------------------------ GraphBLAS: v9.1.0 (Mar 22, 2024) GraphBLAS: v9.1.0 (in library) GraphBLAS version code: 9001000 ------------------------------------------------------------ LAGraph: v1.1.3 (Mar 22, 2024) LAGraph: v1.1.3 (in library) LAGraph version code: 1001003 ------------------------------------------------------------ KLU: v2.3.3 (Mar 22, 2024) KLU: v2.3.3 (in library) KLU version code: 2003003 x [0] = 36.4 x [1] = -32.7 error: 7.10543e-14 ------------------------------------------------------------ LDL: v3.3.2 (Mar 22, 2024) LDL: v3.3.2 (in library) LDL version code: 3003002 x2 [0] = 36.4 x2 [1] = -32.7 error: 0 ------------------------------------------------------------ RBio: v4.3.2 (Mar 22, 2024) RBio: v4.3.2 (in library) RBio version code: 4003002 njumbled 0, nzeros 0 result 0 mtype: iua 2-by-2 matrix |simple 3 1 1 1 iua 2 2 4 0 (40I2) (40I2) (26I3) 1 3 5 1 2 1 2 11 21 12 22 ------------------------------------------------------------ SPEX: v3.1.0 (Mar 22, 2024) SPEX: v3.1.0 (in library) SPEX version code: 3001000 ------------------------------------------------------------ SuiteSparseQR: v4.3.3 (Mar 22, 2024) SuiteSparseQR: v4.3.3 (in library) SuiteSparseQR version code: 4003003 CHOLMOD dense: X from QR: 2-by-1, leading dimension 2, nzmax 2, real, double col 0: 0: 36.4 1: -32.7 OK ------------------------------------------------------------ UMFPACK: v6.3.3 (Mar 22, 2024) UMFPACK: v6.3.3 (in library) UMFPACK version code: 6003003 UMFPACK V6.3.3 (Mar 22, 2024) UMFPACK: Copyright (c) 2005-2024 by Timothy A. Davis. All Rights Reserved. UMFPACK License: SPDX-License-Identifier: GPL-2.0+ UMFPACK is available under alternate licenses, contact T. Davis for details. BLAS used: Intel MKL 64lp BLAS (32-bit integers) BLAS integer size: 4 bytes x [0] = 36.4 x [1] = -32.7 error: 5.68434e-14 UMFPACK: Copyright (c) 2005-2024 by Timothy A. Davis. All Rights Reserved. UMFPACK License: SPDX-License-Identifier: GPL-2.0+ UMFPACK is available under alternate licenses, contact T. Davis for details. Availability: http://www.suitesparse.com UMFPACK V6.3.3 (Mar 22, 2024): OK UMFPACK V6.3.3 (Mar 22, 2024), Info: matrix entry defined as: double Int (generic integer) defined as: int64_t BLAS library used: Intel MKL 64lp BLAS (32-bit integers). size of BLAS integer: 4 MATLAB: no. CPU timer: SuiteSparse_time ( ) number of rows in matrix A: 2 number of columns in matrix A: 2 entries in matrix A: 4 memory usage reported in: 16-byte Units size of int32_t: 4 bytes size of int64_t: 8 bytes size of pointer: 8 bytes size of numerical entry: 8 bytes strategy used: symmetric ordering used: amd on A+A' modify Q during factorization: no prefer diagonal pivoting: yes pivots with zero Markowitz cost: 0 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 square and diagonal preserved pattern of square submatrix S: number rows and columns 2 symmetry of nonzero pattern: 1.000000 nz in S+S' (excl. diagonal): 2 nz on diagonal of matrix S: 2 fraction of nz on diagonal: 1.000000 ordering statistics, for strict diagonal pivoting: est. flops for LU factorization: 3.00000e+00 est. nz in L+U (incl. diagonal): 4 est. largest front (# entries): 4 est. max nz in any column of L: 2 number of "dense" rows/columns in S+S': 0 symbolic factorization defragmentations: 0 symbolic memory usage (Units): 81 symbolic memory usage (MBytes): 0.0 Symbolic size (Units): 40 Symbolic size (MBytes): 0 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)): 2.30000e+01 maximum sum (abs (rows of A)): 4.30000e+01 symbolic/numeric factorization: upper bound actual % variable-sized part of Numeric object: initial size (Units) 45 40 89% peak size (Units) 638 636 100% final size (Units) 3 5 167% Numeric final size (Units) 50 51 102% Numeric final size (MBytes) 0.0 0.0 102% peak memory usage (Units) 758 756 100% peak memory usage (MBytes) 0.0 0.0 100% numeric factorization flops 3.00000e+00 3.00000e+00 100% nz in L (incl diagonal) 3 3 100% nz in U (incl diagonal) 3 3 100% nz in L+U (incl diagonal) 4 4 100% largest front (# entries) 6 4 67% largest # rows in front 3 2 67% largest # columns in front 2 2 100% initial allocation ratio used: 1.2 # of forced updates due to frontal growth: 0 number of off-diagonal pivots: 0 nz in L (incl diagonal), if none dropped 3 nz in U (incl diagonal), if none dropped 3 number of small entries dropped 0 nonzeros on diagonal of U: 2 min abs. value on diagonal of U: 2.11e-02 max abs. value on diagonal of U: 4.78e-01 estimate of reciprocal of condition number: 4.42e-02 indices in compressed pattern: 2 numerical values stored in Numeric object: 4 numeric factorization defragmentations: 0 numeric factorization reallocations: 0 costly numeric factorization reallocations: 0 numeric factorization wallclock time (sec): 0.00 solve flops: 4.20000e+01 iterative refinement steps taken: 0 iterative refinement steps attempted: 0 sparse backward error omega1: 7.44e-17 sparse backward error omega2: 0.00e+00 solve wall clock time (sec): 0.00 total symbolic + numeric + solve flops: 4.50000e+01