
AbstractBove and Capretta have presented a method to deal with partial and general recursive functions in constructive type theory which relies on an inductive characterisation of the domains of the functions. The method separates the logical and the computational aspects of an algorithm, and facilitates the formal verification of the functions being defined. For nested recursive functions, the method uses Dybjer' schema for simultaneous inductive-recursive definitions. However, not all constructive type theories support this kind of definitions.Here we present a new approach for dealing with partial and general recursive functions that preserves the advantages of the method by Bove and Capretta, but which does not rely on inductive-recursive definitions. In this approach, we start by inductively defining the graph of the function, from which we first define the domain and afterwards the type-theoretic version of the function. We show two ways of proving the formal specification of the functions defined with this new approach: by induction on the graph, or by using an induction principle in the style of the induction principle associated to the domain predicates of the Bove-Capretta method.
constructive type theory, partial functions, nested functions, General recursive functions, Theoretical Computer Science, Computer Science(all)
constructive type theory, partial functions, nested functions, General recursive functions, Theoretical Computer Science, Computer Science(all)
| citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 5 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Average | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Average | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Average |
