Just for this problem, let the alphabet be I = { a b c}. Let us...
Just for this problem, let the alphabet be I = { a b c}. Let us consider the language anbncn = { abc aabbcc aaabbbccc ... } Prove that this language is nonregular by the (i) Pumping lemma.
Show this by pumping x,y,z
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Let alphabet Σ = {a, b, c}, and consider L1 = {w ∈ Σ ∗ |...
Let alphabet Σ = {a, b, c}, and consider L1 = {w ∈ Σ ∗ | more than half the symbols in w are c’s}. Prove that L1 is not FS using the pumping lemma.
Let y-and Г be two alphabets, and let Г be the alphabet be the alphabet of vectors where the first element is from Σ and the second is from「 For example, if -(a,b) and Г-{0.1} then and B c Г be any...
Let y-and Г be two alphabets, and let Г be the alphabet be the alphabet of vectors where the first element is from Σ and the second is from「 For example, if -(a,b) and Г-{0.1} then and B c Г be any regular languages, and consider the language Let A Show A B is regular.
Let y-and Г be two alphabets, and let Г be the alphabet be the alphabet of vectors where the first element is from Σ and...
John Doe claims that the language L, of all strings over the alphabet Σ = {...
John Doe claims that the language L, of all strings over the alphabet Σ = { a, b } that contain an even number of occurrences of the letter ‘a’, is not a regular language. He offers the following “pumping lemma proof”. Explain what is wrong with the “proof” given below. “Pumping Lemma Proof” We assume that L is regular. Then, according to the pumping lemma, every long string in L (of length m or more) must be “pumpable”. We...
(3) Consider the following three languages over the alphabet Σ default i,j, k, are non-negative i...
(3) Consider the following three languages over the alphabet Σ default i,j, k, are non-negative integers (can be 0): (a,b,c,d), where by One of these is not a CFL; the other two are CFLs. Give context-free grammars for the two that are CFLs, and a CFL Pumping Lemma proof for the one that is not a CFL. (You need not prove your grammars correct, but their plan should be clear. (6+6+18 30 pts., for 74 total on the set)
(3)...
5. Consider the language L = {1'0/1k e {0,1}* |i >01) >0 Ak = i*j}; to...
5. Consider the language L = {1'0/1k e {0,1}* |i >01) >0 Ak = i*j}; to show that Lis! not a regular language using pumping lemma, the correct choice for the word is: a. 10011 x=1- b. 1POP 1P Z=1 Le 1290? 12p* Z=1P OPS 2P Y-101 YEK d. 10P1P y=1" t:P
6. (10 pts) Is L regular? Either prove that it is not regular using pumping lemma,...
6. (10 pts) Is L regular? Either prove that it is not regular using pumping lemma, or describe an RE for it. The alphabet of the language is 10,1, +,-) L = { x = y + z | x, y, z are binary integers, and x is the sum of y and z }. For example, strings 1000 = 101 + 11, 0101 = 010 + 11, and 101 = 101 + 0 are in the language, but strings...
1(a)Draw the state diagram for a DFA for accepting the following language over alphabet {0,1}: {w...
1(a)Draw the state diagram for a DFA for accepting the following language over alphabet {0,1}: {w | the length of w is at least 2 and has the same symbol in its 2nd and last positions} (b)Draw the state diagram for an NFA for accepting the following language over alphabet {0,1} (Use as few states as possible): {w | w is of the form 1*(01 ∪ 10*)*} (c)If A is a language with alphabet Σ, the complement of A is...
4. (Non-CFLs) Prove that the following languages are not context-free. (b) The following language over the...
4. (Non-CFLs) Prove that the following languages are not context-free. (b) The following language over the alphabet {a, b, c}: B = {aix | i ≥ 0, x ∈ {b, c}* , and if i = 1 then x = ww for some string w}. (Careful: B satisfies the pumping lemma for CFLs! Make sure you understand why, but you don’t need to write it down.)
1. Consider the alphabet {a,b,c}. Construct a finite automaton that accepts the language described by the...
1. Consider the alphabet {a,b,c}. Construct a finite automaton that accepts the language described by the following regular expression. 6* (ab U bc)(aa)* ccb* Which of the following strings are in the language: bccc, babbcaacc, cbcaaaaccbb, and bbbbaaaaccccbbb (Give reasons for why the string are or are not in the language). 2. Let G be a context free grammar in Chomsky normal form. Let w be a string produced by that grammar with W = n 1. Prove that the...
3. Let a, b, c E Z such that ca and (a,b) = 1. Show that...
3. Let a, b, c E Z such that ca and (a,b) = 1. Show that (c, b) = 1. 4. Suppose a, b, c, d, e E Z such that e (a - b) and e| (c,d). Show that e (ad — bc). 5. Fix a, b E Z. Consider the statements P: (a, b) = 1, and Q: there exists x, y E Z so that ax + by = 1. Bézout’s lemma states that: if P, then...
Let y-and Г be two alphabets, and let Г be the alphabet be the alphabet of vectors where the first element is from Σ and the second is from「 For example, if -(a,b) and Г-{0.1} then and B c Г be any regular languages, and consider the language Let A Show A B is regular.
Let y-and Г be two alphabets, and let Г be the alphabet be the alphabet of vectors where the first element is from Σ and...
(3) Consider the following three languages over the alphabet Σ default i,j, k, are non-negative integers (can be 0): (a,b,c,d), where by One of these is not a CFL; the other two are CFLs. Give context-free grammars for the two that are CFLs, and a CFL Pumping Lemma proof for the one that is not a CFL. (You need not prove your grammars correct, but their plan should be clear. (6+6+18 30 pts., for 74 total on the set)
(3)...
5. Consider the language L = {1'0/1k e {0,1}* |i >01) >0 Ak = i*j}; to show that Lis! not a regular language using pumping lemma, the correct choice for the word is: a. 10011 x=1- b. 1POP 1P Z=1 Le 1290? 12p* Z=1P OPS 2P Y-101 YEK d. 10P1P y=1" t:P
6. (10 pts) Is L regular? Either prove that it is not regular using pumping lemma, or describe an RE for it. The alphabet of the language is 10,1, +,-) L = { x = y + z | x, y, z are binary integers, and x is the sum of y and z }. For example, strings 1000 = 101 + 11, 0101 = 010 + 11, and 101 = 101 + 0 are in the language, but strings...
1. Consider the alphabet {a,b,c}. Construct a finite automaton that accepts the language described by the following regular expression. 6* (ab U bc)(aa)* ccb* Which of the following strings are in the language: bccc, babbcaacc, cbcaaaaccbb, and bbbbaaaaccccbbb (Give reasons for why the string are or are not in the language). 2. Let G be a context free grammar in Chomsky normal form. Let w be a string produced by that grammar with W = n 1. Prove that the...
3. Let a, b, c E Z such that ca and (a,b) = 1. Show that (c, b) = 1. 4. Suppose a, b, c, d, e E Z such that e (a - b) and e| (c,d). Show that e (ad — bc). 5. Fix a, b E Z. Consider the statements P: (a, b) = 1, and Q: there exists x, y E Z so that ax + by = 1. Bézout’s lemma states that: if P, then...
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