csc_ilu csc_ilu0 csc_ilu_solve csc_ssor_solve csr_ilu csr_ilu0 csr_ilu_solve csr_ssor_solve csx_ds csx_ds_solve csx_ssor

csx_ds_solve() void csx_ds_solve ( int  n, const double  d[], const double  b[], double  x[], int *  info  ) Diagonal scaling preconditioner (CSC/CSR) Purpose This routine is the diagonal scaling preconditioner for the coefficient matrix A of the sparse linear equations. It solves the equation M*x = b, where M (= diagonal matrix of A) is the preconditioner matrix. Parameters [in] n Dimension of matrix A. (n >= 0) (If n = 0, returns without computation) [in] d[] Array d[ld] (ld >= n) Diagonal elements of preconditioner matrix M obtained by csc_ssor(). [in] b[] Array b[lb] (lb >= n) Right hand side vector b. [out] x[] Array x[lx] (lx >= n) Solution vector x. [out] info = 0: Successful exit. = i < 0: The (-i)-th argument is invalid.