A meadow is a commutative ring with an inverse operator satisfying 0(-1) = 0. We determine the initial algebra of the meadows of characteristic 0 and show that its word problem is decidable.
Models as Measuring Instrument: Measurement of Duration Dependence of Unemployment (2005)
Nancy Cartwright views models as blueprints for nomological machines ¿ machines that, if properly shielded, generate law¿like behaviour or regularities. Marcel Boumans has argued that we can...