zgbmv zgemv zgerc zgeru zhbmv zhemv zher zher2 zhpmv zhpr zhpr2 zsbmv zspmv zspr zspr2 zsymv zsyr zsyr2 ztbmv ztbsv ztpmv ztpsv ztrmv ztrsv

ztbmv() void ztbmv ( char  uplo, char  trans, char  diag, int  n, int  k, int  ldab, doublecomplex  ab[], doublecomplex  x[], int  incx  ) x <- Ax, x <- ATx or x <- AHx (complex triangular band matrices) (BLAS 2) Purpose This routine performs the matrix-vector operations x <- A*x, x <- A^T*x or x <- A^H*x where x is a vector and A is an n x n unit or non-unit, upper or lower triangular band matrix, with k+1 diagonals. 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. [in] trans Specifies the operation to be performed as follows: = 'N': x <- A*x. = 'T': x <- A^T*x. = 'C': x <- A^H*x. [in] diag Specifies whether or not A is unit triangular as follows: = 'N': A is not assumed to be unit triangular. = 'U': A is assumed to be unit triangular. (Diagonal elements of ab[][] are not references) [in] n Order of the matrix A. (n >= 0) (If n = 0, returns without computation) [in] k Number of super/sub-diagonals of the matrix A. (k >= 0) [in] ldab Leading dimension of the two dimensional array ab[][]. (ldab >= k + 1) [in] ab[][] Array ab[lab][ldab] (lab >= n) n x n triangular band matrix A in k+1 x n symmetric band matrix form. (Upper or lower part is to be stored in accordance with uplo) [in,out] x[] Array x[lx] (lx >= 1 + (n - 1)*abs(incx)) [in] Input vector x. [out] Output vector. (= A*x, A^T*x or A^H*x) [in] incx Storage spacing between elements of x. (incx != 0) Reference BLAS