Let R be a TM that decides EQCFG and construct TM S to decide ALLCFG Then S works in complement EQCFG is a Turing-recognizable language Now, Let STM = {〈M〉 M is a TM that accepts wR whenever it accepts w } Show that
Turing machine M such that M halts and accepts on any input w ∈ A, and M rejects or loops on First show C ∈ NP by giving a deterministic polynomial- time verifier for C (Alterna- (b) Give the transition functions δ of a DFA, NFA, PDA, Turing machine and Return tape head to left-hand end of tape, and go to stage 3
Let S = {〈M〉 M is a DFA that accepts w whenever it accepts the reverse of w} (b) Ans To show S is decidable, we construct a decider D for S as follows (Let
Prove that C is Turing-recognizable iff a decidable language D exists such that Let T = {〈M〉M is a TM that accepts wR whenever it accepts w}(wR is the reverse of w) M accepts 〈M,w〉 ⇔ MT accepts 〈Mw〉 ⇔ M does not accept w ⇔ 〈M,w〉 ∈ ATM Therefore, T is unrecognizable 3 Let Show that M ∈ P
This machine accepts a string at q3 after a single "c" following this conceptualization breaks down is when the string itself is either "bb" or "aa", which we will We show that the pumping lemma does not hold for this language that aw is in L Let C be a collection of languages over S* for some finite alphabet S Suppose
Let each point in S be represented as a pair of (x,y) coordinates where substituting a xR for sR (a) Show that L is regular by giving a dfa that accepts it We get a nondeterministic machine, as we generally do when we use the simple approach S will get us to one nonaccepting state (the old accepting state), and two
2 sept 2014 · Let #(a,w) denote the number of times symbol a appears in string w; (b) Describe a DFA that accepts the set of all strings composed algorithm in part (a ) does not produce an optimal solution when A binary-tree Turing machine uses an infinite binary tree as its tape; that S R := 〈M〉 M rejects 〈M〉
18 mai 2009 · 7 1 3 The construction of a DFA from an NFA 21 2 4 Formal definition of a Turing machine Here is a simple state machine (i e , finite automaton) M that accepts all For example, when our automaton above accepts the string aabb, is to show that three different ways of defining languages, that is