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The band routines assume the matrix and are stored in LAPACK
band form. In the following we used *AB* and *MB* to denote
and `B` stored in band form. If the matrix has *kl*
subdiagonals and *ku* superdiagonals, then the *ij*th element of A
*a*_{ij} is stored in AB(*kl*+*ku*+1+*i*-*j*,*j*) for
. An example of a band matrix
with *kl*=2, *ku*=1 is illustrated below.
The elements marked * in the matrix AB need not be set.

*Chao Yang*

*11/7/1997*