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###

The `NonLinear` procedure

The purpose of the procedure is to compute an interval evaluation of
the non linear term of the equations (the terms in the
mathematical background). This procedure take as argument a box
and the returned evaluation of the non-linear terms.
Consider for example the equations:

The non-linear terms of these equations are
and
and the `NonLinear` procedure is
written as:
void NonLinear(INTERVAL_VECTOR &x,INTERVAL_VECTOR &X)
{
X(1) = (-0.1+0.25*x(1))*Sqr(x(1));
X(2) = (-0.1+0.55*x(2))*Sqr(x(2));
}

Jean-Pierre Merlet
2012-12-20