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[Coq-Club] why Prop appears?


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  • From: Loic Pottier <loic.pottier AT inria.fr>
  • To: coq-club AT inria.fr
  • Subject: [Coq-Club] why Prop appears?
  • Date: Tue, 14 Dec 2010 16:05:39 +0100 (CET)

Hello,

with coq-8.3:

Inductive paths (T:Type)(t:T): T -> Type :=   idpath: paths _ t t.
Check (forall X:Type, paths _ X X).

returns

forall X : Type, paths Type X X
     : Prop

But I expected Type instead of Prop... where from does this Prop come???

Loïc



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