This article studies a specific kind of change in an argumentation system which has been little studied so far : the removal of an argument and its interactions. To support our approach, we present an example that underlines the interest of removing an argument. Then, we present Dung’s argumentation formal framework and introduce the expansive, narrowing and monotonic change notions. These noti...

A new optimization-based numerical method is proposed for the solution of diffusion problems with sign-changing conductivity coefficients. In contrast to existing approaches, our method does not rely on the discretization of a stabilized equation and the convergence of the scheme can be proved without any symmetry assumption on the mesh near the interface where the conductivity sign changes. Ré...