LTO was the closure of LT under concatenation and Boolean operations which turned out to be identical to SF, the closure of the ?nite languages under union, concatenation and complement. In moving from LT to Recog, we picked up the closure under concatenation and also added closure under Kleene closure (also known as "Kleene-∗" and "iteration closure"). Kleene closure was introduced by Stephen Kleene in his de?nition of the Regular Languages, the closure of the ?nite languages under union, concatenation and Kleene closure.

## Finite languages and strictly local languages, Theorem The class of ?nite l...Theorem The class of ?nite languages is a proper subclass of SL. Note that the class of ?nite languages is closed under union and concatenation but SL is not closed under either. N |

## First model of computation, Computer has a single unbounded precision count...Computer has a single unbounded precision counter which you can only increment, decrement and test for zero. (You may assume that it is initially zero or you may include an explici |

## Agents architecture, Describe the architecture of interface agencyDescribe the architecture of interface agency |

## Moore machine, Construct a Moore machine to convert a binary string of radi...Construct a Moore machine to convert a binary string of radix 4. |

## Automaton theory, let G=(V,T,S,P) where V={a,b,A,B,S}, T={a,b},S the start ...let G=(V,T,S,P) where V={a,b,A,B,S}, T={a,b},S the start symbol and P={S->Aba, A->BB, B->ab,AB->b} 1.show the derivation sentence for the string ababba 2. find a sentential form |

## Recognition problem, The Recognition Problem for a class of languages is th...The Recognition Problem for a class of languages is the question of whether a given string is a member of a given language. An instance consists of a string and a (?nite) speci?cat |

## Kleene Closure, 1. Does above all''s properties can be used to prove a lang...1. Does above all''s properties can be used to prove a language regular? 2..which of the properties can be used to prove a language regular and which of these not? 3..Identify one |

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