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## Arguments

AB
(input/output) REAL or COMPLEX array, shape with (AB,1) and (AB,2) , where is the number of subdiagonals or superdiagonals in the band and is the order of and .
On entry, the upper (if UPLO = 'U') or lower (if UPLO = 'L') triangle of matrix in band storage. The diagonals of are stored in the rows of AB so that the column of is stored in the column of as follows: On exit, the contents of AB are destroyed.

BB
(input/output) REAL or COMPLEX array, shape with (BB,1) and (BB,2) , where is the number of subdiagonals or superdiagonals in the band of .
On entry, the upper (if UPLO = 'U') or lower (if UPLO = 'L') triangle of matrix in band storage. The diagonals of are stored in the rows of BB so that the column of is stored in the column of as follows: On exit, the factor from the split Cholesky factorization .

W
(output) REAL array, shape with (W) .
The eigenvalues in ascending order.

UPLO
Optional (input) CHARACTER(LEN=1). Default value: 'U'.

Z
Optional (output) REAL or COMPLEX square array, shape with (Z,1) .
The matrix of eigenvectors, normalized so that .

INFO
Optional (output) INTEGER. If INFO is not present and an error occurs, then the program is terminated with an error message.

References:  and [17,9,20].     Next: Examples Up: Generalized Symmetric Eigenvalue Problems Previous: Purpose   Contents   Index
Susan Blackford 2001-08-19