This seven-part Introduction to the contributions of Stefano Zambelli to modern macroeconomic theory and simulations is nothing more than a scratching of the surface of his rich input. In particular, the first and last parts are personal introductions; the middle four parts are reasonably...

An attempt is made to analyze some of the attractors in Zambelli’s macrodynamics as knots. This enables one to connect the richness of dynamical systems theory with the dynamic sequence analysis of knots.

This paper discusses the complexity and computability of the ‘Deissenberg Problem’ of finding the ‘best’ point in the efficient set. It is shown that the problem is computably undecidable and that the efficient set of the problem is algorithmically complex.