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1. Let £ = {0,1} and consider the language L of all binary strings of odd...
2. Let L = {hMi: M is a Turing machine that accepts at least two binary strings}. a) Define the notions of a recognisabl...
2. Let L = {hMi: M is a Turing machine that accepts at least two
binary strings}. a) Define the notions of a recognisable language
and an undecidable language. [5 marks] b) Is L Turing-recognisable?
Justify your answer with an informal argument. [5 marks] c) Prove
that L is undecidable. (Hint: use Rice’s theorem.) [20 marks] d)
Bonus: Justify with a formal proof your answer to b). [20
marks]
2. Let L-M M): M is a Turing machine that accepts...
For a string s ∈ {0, 1} let denote the number represented by in the binary * s2 s numeral system. For example 1110 in binary has a value of 14 . Consider the language: L = {u#w | u,w ∈ {0, 1} , u } ,...
For a string s ∈ {0, 1} let denote the number represented by in
the binary * s2 s numeral system. For example 1110 in binary has a
value of 14 . Consider the language: L = {u#w | u,w ∈ {0, 1} , u }
, * 2 + 1 = w2 meaning it contains all strings u#w such that u + 1
= w holds true in the binary system. For example, 1010#1011 ∈ L and
0011#100 ∈...
2. Let L-M M): M is a Turing machine that accepts at least two binary strings. a) Define the notions of a recognisable...
2. Let L-M M): M is a Turing machine that accepts at least two binary strings. a) Define the notions of a recognisable language and an undecidable language. [5 marks [5 marks] b) Is L Turing-recognisable? Justify your answer with an informal argument. c) Prove that L is undecidable. (Hint: use Rice's theorem.) [20 marks] 20 marks] d) Bonus: Justify with a formal proof your answer to b).
2. Let L-M M): M is a Turing machine that accepts at...
Design a non-ambiguous grammar generating the language consisting of all binary strings, which contain an odd...
Design a non-ambiguous grammar generating the language consisting of all binary strings, which contain an odd number of 0’s and an odd number of 1’s. Justify correctness of your construction.
=(V, En) 5. Let n1 be an integer and define the graph Gn as follows {0,1}", the set of all binary strings of length...
=(V, En) 5. Let n1 be an integer and define the graph Gn as follows {0,1}", the set of all binary strings of length n. Vn = Two vertices x and y are connected by an edge emu if and only if x and y differs in exactly one position. (a) (4 points) Draw the graph Gn for n = 1,2,3 (b) (4 points) For a general n 2 1, find |Vn and |En (c) (10 points) Prove that for...
Design a Turing machine that recognizes the language L := {vSw : u, w E {0,1)" and u is a substri...
Design a Turing machine that recognizes the language L := {vSw : u, w E {0,1)" and u is a substring of u For example, 0801 E L' 10$010 E L, but i 00$10101 ¢ L. Describe the High Level algorithm informally and define the corresponding Turing Machine in details.
Design a Turing machine that recognizes the language L := {vSw : u, w E {0,1)" and u is a substring of u For example, 0801 E L' 10$010 E...
4. Let = {0,1} and let A denote a language of strings that consist solely of...
4. Let = {0,1} and let A denote a language of strings that consist solely of zeroes, or ones. For example, strings 000 and 11 belong to A, whereas 11101 is not. a) Draw a state diagram of an NFA that recognizes A. b) How many states you need with an DFA to the same task?
Can you please thoroughly explain part B? Let Σ {0,1} be an alphabet. Suppose the language...
Can you please thoroughly explain part B?
Let Σ {0,1} be an alphabet. Suppose the language Ly is the set of all strings that start with a 1 and L2 is the set of all strings that end in a 1. Describe Lj U L2 and (L1 UL2)* using English. b) Decide if the given strings belong to the language defined by the given regular expression. If it does not belong, then explain why. 0(1|€)10(e|0)*11 , strings: 0110011, 0100011001111
1. Use a Regular Expression to define the set of all bit strings of one or...
1. Use a Regular Expression to define the set of all bit strings
of one or more 0's followed by only a 1.
2. Use a Regular Expression to define the set of all bit string
of two or more symbols followed by three or more 0's.
3. Are these two grammars the same?
a. S-> aSb|ab|λ
b. S-> aAb|ab A->aAb|λ
4. Use the process of elimination to find the language of the
following FA: (see picture for diagram)
5....
State diagrams for Turing Machines. Suppose you are given a string w ∈ {0,1}* placed on a Turin...
State diagrams for Turing Machines. Suppose you are given a string w ∈ {0,1}* placed on a Turing Machine tape. Give the state diagram for the Turing Machine required to take the initial string, w, and replace it on the tape with a new string, w′. The new string, w′, is formed by shifting the entire input string one cell to the right. Suppose you are given a string w ∈ {0, 1}* placed on a Turing Machine tape. Give...
2. Let L = {hMi: M is a Turing machine that accepts at least two
binary strings}. a) Define the notions of a recognisable language
and an undecidable language. [5 marks] b) Is L Turing-recognisable?
Justify your answer with an informal argument. [5 marks] c) Prove
that L is undecidable. (Hint: use Rice’s theorem.) [20 marks] d)
Bonus: Justify with a formal proof your answer to b). [20
marks]
2. Let L-M M): M is a Turing machine that accepts...
For a string s ∈ {0, 1} let denote the number represented by in
the binary * s2 s numeral system. For example 1110 in binary has a
value of 14 . Consider the language: L = {u#w | u,w ∈ {0, 1} , u }
, * 2 + 1 = w2 meaning it contains all strings u#w such that u + 1
= w holds true in the binary system. For example, 1010#1011 ∈ L and
0011#100 ∈...
2. Let L-M M): M is a Turing machine that accepts at least two binary strings. a) Define the notions of a recognisable language and an undecidable language. [5 marks [5 marks] b) Is L Turing-recognisable? Justify your answer with an informal argument. c) Prove that L is undecidable. (Hint: use Rice's theorem.) [20 marks] 20 marks] d) Bonus: Justify with a formal proof your answer to b).
2. Let L-M M): M is a Turing machine that accepts at...
=(V, En) 5. Let n1 be an integer and define the graph Gn as follows {0,1}", the set of all binary strings of length n. Vn = Two vertices x and y are connected by an edge emu if and only if x and y differs in exactly one position. (a) (4 points) Draw the graph Gn for n = 1,2,3 (b) (4 points) For a general n 2 1, find |Vn and |En (c) (10 points) Prove that for...
Design a Turing machine that recognizes the language L := {vSw : u, w E {0,1)" and u is a substring of u For example, 0801 E L' 10$010 E L, but i 00$10101 ¢ L. Describe the High Level algorithm informally and define the corresponding Turing Machine in details.
Design a Turing machine that recognizes the language L := {vSw : u, w E {0,1)" and u is a substring of u For example, 0801 E L' 10$010 E...
4. Let = {0,1} and let A denote a language of strings that consist solely of zeroes, or ones. For example, strings 000 and 11 belong to A, whereas 11101 is not. a) Draw a state diagram of an NFA that recognizes A. b) How many states you need with an DFA to the same task?
Can you please thoroughly explain part B?
Let Σ {0,1} be an alphabet. Suppose the language Ly is the set of all strings that start with a 1 and L2 is the set of all strings that end in a 1. Describe Lj U L2 and (L1 UL2)* using English. b) Decide if the given strings belong to the language defined by the given regular expression. If it does not belong, then explain why. 0(1|€)10(e|0)*11 , strings: 0110011, 0100011001111
1. Use a Regular Expression to define the set of all bit strings
of one or more 0's followed by only a 1.
2. Use a Regular Expression to define the set of all bit string
of two or more symbols followed by three or more 0's.
3. Are these two grammars the same?
a. S-> aSb|ab|λ
b. S-> aAb|ab A->aAb|λ
4. Use the process of elimination to find the language of the
following FA: (see picture for diagram)
5....
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