zlangb zlange zlangt zlanhb zlanhe zlanhp zlanht zlansb zlansp zlansy zlantr

zlangt() double zlangt ( char  norm, int  n, doublecomplex  dl[], doublecomplex  d[], doublecomplex  du[]  ) One norm, Frobenius norm, infinity norm, or largest absolute value of any element of a complex tridiagonal matrix Purpose This routine returns the value of the one norm, the Frobenius norm, the infinity norm, or the largest absolute value of any element of a complex tridiagonal matrix A. Returns max(abs(Aij)) when norm = 'M', norm1(A) when norm = '1' or 'O', normI(A) when norm = 'I', or normF(A) when norm = 'F' or 'E' where norm1 denotes the one norm of a matrix (maximum column sum), normI denotes the infinity norm of a matrix (maximum row sum) and normF denotes the Frobenius norm of a matrix (square root of sum of squares). Note that max(abs(Aij)) is not a consistent matrix norm. Parameters [in] norm Specifies the value to be returned by zlangt as described above. [in] n Order of the matrix A. (n >= 0) (If n = 0, returns 0) [in] dl[] Array dl[ldl] (ldl >= n - 1) Sub-diagonal elements of tridiagonal matrix A. [in] d[] Array d[ld] (ld >= n) Diagonal elements of tridiagonal matrix A. [in] du[] Array du[ldu] (ldu >= n - 1) Super-diagonal elements of tridiagonal matrix A. Reference LAPACK