3. General results

3.1 Error surcharge

The methods we have developed above provide approximate solutions. The inaccuracy essentially results from the fact that the solution of the variational problem is not sought on the functional space E, but on a subspace $E_h\subset E$ , $E_h$ being of finite dimension, and from the fact that the calculation of integrals is practically done using numerical integration methods. The result of Theorem 2 in the article , an error increase...