1 /*! \mainpage SuperLU Documentation 2 3 SuperLU is a general purpose library for the direct solution of large, 4 sparse, nonsymmetric systems of linear equations on high performance 5 machines. The library is written in C and is callable from either C or 6 Fortran. The library routines perform an LU decomposition with 7 partial pivoting and triangular system solves through forward and back 8 substitution. The library also provides threshold-based ILU factorization 9 preconditioners. 10 11 The factorization routines can handle non-square 12 matrices but the triangular solves are performed only for square 13 matrices. The matrix columns may be preordered (before factorization) 14 either through library or user supplied routines. This preordering for 15 sparsity is completely separate from the factorization. Working 16 precision iterative refinement subroutines are provided for improved 17 backward stability. Routines are also provided to equilibrate the 18 system, estimate the condition number, calculate the relative backward 19 error, and estimate error bounds for the refined solutions. 20 21 */ 22