You should give informal descriptions of the required TMs (not the level of specifics required fo…
You should give informal descriptions of the required TMs (not the level of specifics required fo… | savvyessaywriters.org
You should give informal descriptions of the required TMs (not the level of specifics required for a transition diagram or table – but you must clearly describe the behavior of the machine with respect to the tape(s) and any branching). In Problems 2-5 you only need to provide a high-level algorithm, similar to the examples clone in class. You should use the decidable and undecidable languages that are proven in lecture and textbook so far to arrive at short and precise arguments. You may treat TMs that were designed in class as subroutines in your decidability proofs. Informally describe nondeterministic Turing Machines (multitape if you like) that accept the following languages over {0, 1, #}. You must take advantage of nondeterminism to avoid iteration and save time (that is, prefer many short branches over less longer ones). (a) All strings of 0s and Is that have some substring of length 42 that repeats (that is, strings of the form wxyxz with |x| = 42 and w, y, z arbitrary) (b) All strings of the form w_1#w_2#… #w_n for some n greaterthanorequalto 1, where w_i elementof {0, 1}* and for some j, w_j is the binary representation of the integer j. Prove that the language L is decidable: L:= { | A is a DFA and R a regular expression with L(A) = L(R)}. In the following, M denotes a TM, w a word and n a positive integer. Consider the following two languages: Prove for each language either that it is decidable or that it is undecidable. L_1:= {(M, w, n) | M halts on w after lessthanorequalto n steps}, L_2:= {(M) w, n) | M halts on w after > n steps}. Prove that the language L_all = {(M) | M accepts every input} is undecidable. Prove that L_CSU = {< M >: L(M)contains the string “NCSU”} is undecidable using a reduction from A_TM = {< M, w | M is a Turing Machine and w elementof L(M)}.
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