Investigations on a Pedagogical Calculus of Constructions

Loïc Colson (1) , Vincent Demange (1)

1 LITA - Laboratoire d'Informatique Théorique et Appliquée

In the last few years appeared pedagogical propositional natural deduction systems. In these systems, one must satisfy the pedagogical constraint: the user must give an example of any introduced notion. First we expose the reasons of such a constraint and properties of these "pedagogical" calculi: the absence of negation at logical side, and the "usefulness" feature of terms at computational side (through the Curry-Howard correspondence). Then we construct a simple pedagogical restriction of the calculus of constructions (CC) called CCr. We establish logical limitations of this system, and compare its computational expressiveness to Godel system T. Finally, guided by the logical limitations of CCr, we propose a formal and general definition of what a pedagogical calculus of constructions should be.

Mots clés: mathematical logic; negationless mathematics; constructive mathematics; typed lambda-calculus; calculus of constructions; pedagogical system

Domaines: Logique en informatique [cs.LO]

Loïc Colson, Vincent Demange. Investigations on a Pedagogical Calculus of Constructions. Journal of Universal Computer Science, 2013, 19 (6), pp.729-749. ⟨10.3217/jucs-019-06-0729⟩. ⟨hal-00678784⟩