Induction-recursion
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Induction-recursion is a feature for declaring a type and function on that type. It allows the creation of larger types, such as universes, than Inductive Types. The types created still remains predicative inside Intuitionistic Type Theory.
External Links
Peter Dybjer, A general formulation of simultaneous inductive-recursive definitions in type theory, Journal of Symbolic Logic, Volume 65, Number 2, June 2000, pp 525-549.
A list of Peter Dybjer's publications on induction and induction-recursion