/* Tatica extendVarScope */
\tbegin
\ttactic extendVarScope() \def
\tappliesto (AIn \circseq (\circmu X \circspot (\circvar d : \nat \circspot A) \circseq EC))
\tdo
(\tskip \semibox(
(\mubox (\tlaw Sequence_Unit_part_2() \tsemi \tlaw var_exp_seq() \tsemi \varbox (\tlaw Sequence_Unit_part_2() )))
\tsemi \tlaw Var_Exp_Rec() \tsemi \tlaw Sequence_Unit_part_1()))
\tsemi \tlaw var_exp_seq() \tsemi \varbox (\tskip \semibox \tlaw Sequence_Unit_part_1())
\tend