csc_zusmm csc_zusmv csc_zussm csc_zussv csr_zusmm csr_zusmv csr_zussm csr_zussv hsc_zusmv hsr_zusmv ssc_zusmv ssr_zusmv

csc_zussm() void csc_zussm ( char  uplo, char  trans, char  diag, char  order, int  n, int  nrhs, const doublecomplex  val[], const int  colptr[], const int  rowind[], int  base, int  ldx, doublecomplex  x[], int *  info  ) Solution of AX = B, ATX = B or AHX = B (Complex triangular matrices) (CSC) Purpose This function solves one of the following systems of equations for a sparse matrix in CSC format. A*X = B, A^T*X = B or A^H*X = B where A is an n x n upper or lower sparse triangular matrix, and B and X are n x nrhs dense matrices. Parameters [in] uplo Specifies whether the matrix is an upper or lower triangular matrix as follows: = 'U': A is an upper triangular matrix. = 'L': A is an lower triangular matrix. The other triangular elements (not including diagonal elements) are ignored. [in] trans Specifies the equation to be solved as follows: = 'N': A*X = B. = 'T': A^T*X = B. = 'C': A^H*X = B. [in] diag Specifies whether or not A is assumed to be unit triangular. = 'N': A is not assumed to be unit triangular. = 'U': A is assumed to be unit triangular. (diagonal elements are assumed to be ones. val[]s at diagonal element positions (if exist) are ignored.) [in] order Storage order of x[]. = 'C': Column major. = 'R': Row major. [in] n Number of rows and columns of matrix A. (n >= 0) (If n = 0, returns without computation) [in] nrhs Number of columns of matrices B and C. (nrhs >= 0) (if nrhs = 0, returns without computation) [in] val[] Array val[lval] (lval >= nnz) Values of nonzero elements of matrix A (where nnz is the number of nonzero elements). [in] colptr[] Array colptr[lcolptr] (lcolptr >= n + 1) Column pointers of matrix A. [in] rowind[] Array rowind[lrowind] (lrowind >= nnz) Row indices of matrix A (where nnz is the number of nonzero elements). [in] base Indexing of colptr[] and rowind[]. = 0: Zero-based (C style) indexing: Starting index is 0. = 1: One-based (Fortran style) indexing: Starting index is 1. [in] ldx Leading dimension of two dimensional array x[]. (ldx >= n) [in,out] x[] Array x[lx] (lx >= n*nrhs) [in] Right-hand side matrix B. [out] Solution matrix X. [out] info = 0: Successful exit. = i < 0: The (-i)-th argument is invalid. = i > 0: The matrix is singular (i-th diagonal element is zero).