Vector2D p11Upper = l1.toSpace(new Vector1D(v11.getUpper()));
Assert.assertEquals(1.5, p11Upper.getX(), 1.0e-10);
Assert.assertEquals(3.0, p11Upper.getY(), 1.0e-10);
Line l2 = new Line(new Vector2D(-1.0, 2.0), 0);
SubLine s2 = (SubLine) set.intersection(l2.wholeHyperplane());
List<Interval> i2 = ((IntervalsSet) s2.getRemainingRegion()).asList();
Assert.assertEquals(1, i2.size());
Interval v20 = i2.get(0);
Vector2D p20Lower = l2.toSpace(new Vector1D(v20.getLower()));
Assert.assertEquals(1.0, p20Lower.getX(), 1.0e-10);