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[Coq-Club] Injection


chronological Thread 
  • From: Nadeem Abdul Hamid <nadeem AT acm.org>
  • To: "coq-club AT pauillac.inria.fr" <coq-club AT pauillac.inria.fr>
  • Subject: [Coq-Club] Injection
  • Date: Wed, 02 Jan 2002 10:08:43 -0600
  • Organization: Yale University

Is is possible to prove the following lemma for this
inductive definition?

Inductive jdef : Set
:= jconst : (k:Set)k -> jdef.

Lemma eq_jdef : (x,y:nat)
                          (jconst ? x)=(jconst ? y)
                          -> x=y.

Normally, the Injection tactic could be used, but apparently
jdef is impredicative so it doesn't work.

--- nadeem





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