On entry: the dimension of the array
WORK as declared in the (sub)program from which F07AJF (DGETRI) is called, unless
LWORK=-1, in which case a workspace query is assumed and the routine only calculates the optimal dimension of
WORK (using the formula given below).
Suggested value:
for optimum performance
LWORK should be at least
N×nb, where
nb is the
block size.