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[Coq-Club] Sigma Type Coercion


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  • From: Julio <coquser AT googlemail.com>
  • To: coq-club AT pauillac.inria.fr
  • Subject: [Coq-Club] Sigma Type Coercion
  • Date: Wed, 9 Sep 2009 12:01:39 +0100
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Is sigma type coercion possible?

Require Import String.
Open Scope string_scope.
Record A:Set := {total:nat}.
Record B:Set := {name:string}.

(*Sigma types.*)
Definition ASig := {a:A | (total a) > 10}.
Definition BSig := {b:B | (name b) = "kilometers"}.
(*Syntax for Coercion ASig >-> BSig ?*)



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