doc-src/TutorialI/Inductive/AB.thy
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     1 (*<*)theory AB = Main:(*>*)
     1 (*<*)theory AB imports Main begin(*>*)
     2 
     2 
     3 section{*Case Study: A Context Free Grammar*}
     3 section{*Case Study: A Context Free Grammar*}
     4 
     4 
     5 text{*\label{sec:CFG}
     5 text{*\label{sec:CFG}
     6 \index{grammars!defining inductively|(}%
     6 \index{grammars!defining inductively|(}%