src/HOL/ex/BT.thy
changeset 58889 5b7a9633cfa8
parent 58310 91ea607a34d8
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58888:9537bf1c4853 58889:5b7a9633cfa8
     3     Copyright   1995  University of Cambridge
     3     Copyright   1995  University of Cambridge
     4 
     4 
     5 Binary trees
     5 Binary trees
     6 *)
     6 *)
     7 
     7 
     8 header {* Binary trees *}
     8 section {* Binary trees *}
     9 
     9 
    10 theory BT imports Main begin
    10 theory BT imports Main begin
    11 
    11 
    12 datatype 'a bt =
    12 datatype 'a bt =
    13     Lf
    13     Lf