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1 Regular Languages

Q:What is a computer?

A:数学视角下的computer称为computer model,它具有精确的定义。

本书共提出三类computer model

  1. FA,Regular expression
  2. PDA,CFG
  3. TM,NTM

本章介绍最简单的一类:Finite Automata (FA)、Regular Expression(RE)