author | Christian Urban <christian dot urban at kcl dot ac dot uk> |
Thu, 10 Jan 2013 07:34:08 +0000 | |
changeset 21 | c5e3007fed2a |
parent 20 | ae3d568b887b |
child 22 | cb8754a0568a |
--- a/Paper.thy Thu Jan 10 07:33:51 2013 +0000 +++ b/Paper.thy Thu Jan 10 07:34:08 2013 +0000 @@ -257,7 +257,7 @@ \noindent The first two clauses replace the head of the right-list - with new @{term Bk} or @{term Oc}, repsectively. To see that + with new a @{term Bk} or @{term Oc}, repsectively. To see that these clauses make sense in case where @{text r} is the empty list, one has to know that the tail function, @{term tl}, is defined such that @{term "tl [] == []"} holds. The third clause