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In this chapter we intend to determine some information on the roots
of an univariate polynomial without solving it. A polynomial is
defined by the list of its coefficient ordered along increasing
power in a data structure of type `VECTOR`. For most of the
procedures defined in the sequel the coefficients may also intervals,
in which case the data structure is of type `INTERVAL_VECTOR`
(this type of polynomial will be called *interval polynomial*).

Jean-Pierre Merlet
2012-12-20