Interacting Safely with an Unsafe Environment

Gilles Dowek (1, 2)

1 DEDUCTEAM - Deduction modulo, interopérabilité et démonstration automatique
2 ENS Paris Saclay - Ecole Normale Supérieure Paris-Saclay

We give a presentation of Pure type systems where contexts need not be well-formed and show that this presentation is equivalent to the usual one. The main motivation for this presentation is that, when we extend Pure type systems with computation rules, like in the logical framework DEDUKTI, we want to declare the constants before the computation rules that are needed to check the welltypedness of their type.

Domains: Logic in Computer Science [cs.LO]

Gilles Dowek. Interacting Safely with an Unsafe Environment. Logical Frameworks and Meta-Languages, 2021, Pittsburgh, United States. 337, pp.30 - 38, 2021, ⟨10.4204/eptcs.337.3⟩. ⟨hal-03540149⟩