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| author |  herbelin <herbelin@85f007b7-540e-0410-9357-904b9bb8a0f7> | 2007-10-03 14:41:25 +0000 |
|---|---|---|
| committer | herbelin <herbelin@85f007b7-540e-0410-9357-904b9bb8a0f7> | 2007-10-03 14:41:25 +0000 |
| commit | 95483a55c228a0c3d9628a8b4e6cc45c84b8c894 (patch) | |
| tree | 392b1080d0c4f22020db6566c12210551f120701 /theories/Logic/ClassicalUniqueChoice.v | |
| parent | 1bead2a1ef23f2a281613093d7861815279e336d (diff) | |
Révision de theories/Logic concernant les axiomes de descriptions.
Mise à jour du tableau des axiomes dans la FAQ.
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10170 85f007b7-540e-0410-9357-904b9bb8a0f7
Diffstat (limited to 'theories/Logic/ClassicalUniqueChoice.v')
| -rw-r--r-- | theories/Logic/ClassicalUniqueChoice.v | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/theories/Logic/ClassicalUniqueChoice.v b/theories/Logic/ClassicalUniqueChoice.v index 1fb69d3d3..2e739dd51 100644 --- a/theories/Logic/ClassicalUniqueChoice.v +++ b/theories/Logic/ClassicalUniqueChoice.v @@ -8,7 +8,11 @@ (*i $Id$ i*) -(** This file provides classical logic and unique choice *) +(** This file provides classical logic and unique choice; this is + weaker than providing iota operator and classical logic as the + definite descriptions provided by the axiom of unique choice can + be used only in a propositional context (especially, they cannot + be used to build functions outside the scope of a theorem proof) *) (** Classical logic and unique choice, as shown in [ChicliPottierSimpson02], implies the double-negation of |