“…This solution is then taken as the starting point of an arc-length continuation method and follow the solution along the curve leading to a local minimum of the 1-norm of the vector of coefficients. In doing so we apply the algorithm presented in [1,2]. After this process, we check several methods in practice and finally the solution A 18 collected in Table 4, with E f , ∆ and δ given in Table 3.…”