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src/HOL/Data_Structures/Isin2.thy
changeset 67965 aaa31cd0caef
parent 67964 08cc5ab18c84
child 67967 5a4280946a25
equal deleted inserted replaced
67964:08cc5ab18c84 67965:aaa31cd0caef 
     4 
     4 
     5 theory Isin2
 
     5 theory Isin2
 
     6 imports
 
     6 imports
 
     7   Tree2
 
     7   Tree2
 
     8   Cmp
 
     8   Cmp
 
     9   Set_Interfaces
 
     9   Set_Specs
 
    10 begin
 
    10 begin
 
    11 
    11 
    12 fun isin :: "('a::linorder,'b) tree \<Rightarrow> 'a \<Rightarrow> bool" where
 
    12 fun isin :: "('a::linorder,'b) tree \<Rightarrow> 'a \<Rightarrow> bool" where
 
    13 "isin Leaf x = False" |
 
    13 "isin Leaf x = False" |
 
    14 "isin (Node _ l a r) x =
 
    14 "isin (Node _ l a r) x =
isabelle