The …rst serious attack to the theoretical propositions and policy implications put forward by the "neoclassical synthesis" is due to Milton Friedman (1968) and Edmund Phelps (1967). At the end of the 1960s, they independently developed similar ideas aimed at explaining the positive correlation between output ‡uctuations and in‡ation in the short-run, preserving the neoclassical property of lon...

Desarguesian projective planes of square order are characterized by the property that every quadrangle lies on a unique Baer subplane.