Lambda-calculus and type theory form a foundational framework in computer science and mathematical logic, offering a formal approach to modelling computation and reasoning about programs. At its core, ...
Journal of Philosophical Logic, Vol. 18, No. 4 (Nov., 1989), pp. 399-422 (24 pages) Martin-Löf's constructive type theory forms the basis of this paper. His central notions of category and set, and ...