Question
Given a language L ? ? ? , we define Lhalf = { x | ?y ? ? ? , |y| = |x| such that
Given a language L ? ? ? , we define Lhalf = { x | ?y ? ? ? , |y| = |x| such that xy ? L }.
This is a DFA for L, please create a PDA for Lhalf.
Use the stack in the PDA to count up to half and pop elements after half.
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Hands-On Database
Authors: Steve Conger
2nd Edition
0133024415, 978-0133024418
