_dgecon _dgecov _dgels _dgesv _dlange _dlansy _dpocon _dposv _dsyev

_dlange() double _dlange ( char  norm, int  m, int  n, int  lda, double  a[], double  work[]  ) One norm, Frobenius norm, infinity norm, or largest absolute value of any element of a general rectangular 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 real 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 dlange as described above. [in] m Number of rows of the matrix A. (m >= 0) (If m = 0, returns 0) [in] n Number of columns of the matrix A. (n >= 0) (If n = 0, returns 0) [in] lda Leading dimension of the two dimensional array a[][]. (lda >= max(1, m)) [in] a[][] Array a[la][lda] (la >= n) m×n matrix A. [out] work[] Array work[lwork] (lwork >= max(1, m) when norm = 'I', otherwise work[] is not referenced) Work array. Reference LAPACK