Summary of results
======================

The results for the :math:`G` energy return rate are correct because the difference is less than :math:`7`% (excluding the calculation on the first ring whose radius is zero).

The stability of the calculation of :math:`G` on other crowns is excellent since it leads to variations of less than :math:`\mathrm{0,05}`%.

The use of crowns with a zero lower radius is to be avoided.