In de Clippel et al. (2019), it is shown that, perhaps surprisingly, the set of implementable social choice functions essentially same whether agents have bounded depth reasoning or rational expectations. The picture quite different when taking into account possibility small modeling mistakes. While continuous (strict) equilibrium implementation becomes very demanding (Oury and Tercieux (2012) ...

One of the main concerns about parallel mechanisms is the presence of singular points within their workspaces. In singular positions the mechanism gains or loses one or several degrees of freedom. It is impossible to control the mechanism in singular positions. Therefore, these positions have to be avoided. This is a vital need especially in computer controlled machine tools designed and manufa...