author | paulson |
Wed, 24 May 2000 18:47:43 +0200 | |
changeset 8959 | 9d793220a46a |
parent 8958 | ba75f564726b |
child 8960 | 0cd01ec1830b |
src/HOL/HOL.thy | file | annotate | diff | comparison | revisions |
--- a/src/HOL/HOL.thy Wed May 24 18:46:38 2000 +0200 +++ b/src/HOL/HOL.thy Wed May 24 18:47:43 2000 +0200 @@ -68,6 +68,10 @@ * :: "['a::times, 'a] => 'a" (infixl 70) (*See Nat.thy for "^"*) +axclass plus_ac0 < plus, zero + commute: "x + y = y + x" + assoc: "(x + y) + z = x + (y + z)" + zero: "0 + x = x" (** Additional concrete syntax **)