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| -- universe polymorphism | |
| module UnivPoly where | |
| -- core language | |
| type Ix = Int | |
| data Term | |
| = Var Ix | |
| | Abs Term | |
| | App Term Term |
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| (******************************************************) | |
| (** //// Validation of the "filter" Function //// *) | |
| (******************************************************) | |
| Require Import List Bool Lt. | |
| Section Filter. | |
| (*////////////////////////////////////////////////////*) |