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If the generalized eigenvalue problem
is to be solved, then one of the drivers
`dsdrv3, dsdrv4, dsdrv5, dsdrv6` should be used.
If either or may be factored, then
the generalized eigenvalue problem may be converted to a standard
eigenvalue problem as described in 3.2 of Chapter 3,

*Chao Yang*

*11/7/1997*