Types for Proofs and Programs

Implicit coercions in type systems.- A two-level approach towards lean proof-checking.- The greatest common divisor: A case study for program extraction from classical proofs.- Extracting a proof of coherence for monoidal categories from a proof of normalization for monoids.- A constructive proof of the Heine-Borel covering theorem for formal reals.- An application of constructive completeness.- Automating inversion of inductive predicates in Coq.- First order marked types.- Internal type theory.- An application of co-inductive types in Coq: Verification of the alternating bit protocol.- Conservativity of equality reflection over intensional type theory.- A natural deduction approach to dynamic logic.- An algorithm for checking incomplete proof objects in type theory with localization and unification.- Decidability of all minimal models.- Circuits as streams in Coq: Verification of a sequential multiplier.- Context-relative syntactic categories and the formalization of mathematical text.- A simple model construction for the Calculus of Constructions.- Optimized encodings of fragments of type theory in first order logic.- Organization and development of a constructive axiomatization.