4. Summary of results

The results for the \(G\) 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 \(G\) 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.