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As is clear from Figure 9, all
solutions of
with
enter and
remain in the backwards funnel between
and
as
.
That is, for all t less than some negative constant
. This inequality can
be integrated from t to
; an argument identical to the one above
then shows that

where
is the time when
enters the funnel. It can be shown
[4, .6] that the solutions with
(more generally all
solutions lying above the curve
in the left half-plane) become
unbounded at a finite time
; such solutions
are defined
only for
.
Exercise. Use similar techniques to identify the
behavior of solutions to
, for any k>0.

Contents
Next: Conclusion
Up: The Riccati Transformation
Previous: A note on