On 2nd Order Calculi of Individuals
Karl-Georg Niebergall · THEORIA An International Journal for Theory History and Foundations of Science · 2009
From early work of N. Goodman to recent approaches by H. Field and D. Lewis, there have been attempts to combine 2nd order languages with calculi of individuals. This paper is a contribution, containing basic definitions and distinctions and some metatheorems, to the development of a general metatheory of such theories.