Problem 3. Write the following languages in (Set builder /Pattern/Rule) notation? a) The set of strings over {a,b,c} that contain the substring bb. b) The set of strings over {a,b,c} that end with bb. c) The set of strings over {a,b,c} that begin with bb.

Database System Concepts
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Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Chapter1: Introduction
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Problem 1. List the first 3 strings of the following languages:
a) L = {b"aa: n ≥ 2}
b) L = {a" cb": n ≥ 0}
c) L = {(bab)": n ≥ 0}
d) L = {abwba: w € {a,b}"}
e) L = {a³n bam:n, m≥ 1}
f) L = {w: w E E' and Σ = {a,b} and |w|mod 3 = 0}
g) L = {w₁aaw₂: W₁ E {a,b} and w₂ € {c,d}" }
h) L = {w: w E E' and Σ = {a,b} and Na(w) mod 3 = 2 and N₁ (w) ≥ 0}
i) L = {waw: w E E+ and Σ = {x,y}}
Problem 2. (Operations on languages)
let L₁ = {10,011), L2 = {2,0, 111}, L3 = {1(101)": n ≥0}, L4 = {cma": n ≥ 2, m≥ 0} and
L5 = {w: w€ {a,c}* and Na(w) ≥ Ne(w)},
a) List the strings in Eº.(concatenation 0 times), Σ = {0,1}
b) List the strings in 2³.(concatenation 3 times), Σ = {0,1}
c) List the strings in L 1L 2. (concatenation), Σ = {0,1}
d) List the first 5 string in L2. (Kleene star)
e) List the strings in L2nL3.
f) List the strings in L4 L5.
g) List the strings in L4 UL5.
h) Write L3 in set builder notation (pattern/rule).
Problem 3. Write the following languages in (Set builder /Pattern/Rule) notation?
a) The set of strings over {a,b,c} that contain the substring bb.
b) The set of strings over {a,b,c} that end with bb.
c) The set of strings over {a,b,c} that begin with bb.
d) The set of strings over {a,b,c} in which the number of a's in the string is even.
e) The set of strings over {a,b,c} in which the length of the string is multiple of 5.
f) The set of strings over {a,b,c} in which the total number of a's,b's and c's is greater than
10.
g) The set of strings over {a,b,c} in which the total number of b's and c's is 5.
Transcribed Image Text:Problem 1. List the first 3 strings of the following languages: a) L = {b"aa: n ≥ 2} b) L = {a" cb": n ≥ 0} c) L = {(bab)": n ≥ 0} d) L = {abwba: w € {a,b}"} e) L = {a³n bam:n, m≥ 1} f) L = {w: w E E' and Σ = {a,b} and |w|mod 3 = 0} g) L = {w₁aaw₂: W₁ E {a,b} and w₂ € {c,d}" } h) L = {w: w E E' and Σ = {a,b} and Na(w) mod 3 = 2 and N₁ (w) ≥ 0} i) L = {waw: w E E+ and Σ = {x,y}} Problem 2. (Operations on languages) let L₁ = {10,011), L2 = {2,0, 111}, L3 = {1(101)": n ≥0}, L4 = {cma": n ≥ 2, m≥ 0} and L5 = {w: w€ {a,c}* and Na(w) ≥ Ne(w)}, a) List the strings in Eº.(concatenation 0 times), Σ = {0,1} b) List the strings in 2³.(concatenation 3 times), Σ = {0,1} c) List the strings in L 1L 2. (concatenation), Σ = {0,1} d) List the first 5 string in L2. (Kleene star) e) List the strings in L2nL3. f) List the strings in L4 L5. g) List the strings in L4 UL5. h) Write L3 in set builder notation (pattern/rule). Problem 3. Write the following languages in (Set builder /Pattern/Rule) notation? a) The set of strings over {a,b,c} that contain the substring bb. b) The set of strings over {a,b,c} that end with bb. c) The set of strings over {a,b,c} that begin with bb. d) The set of strings over {a,b,c} in which the number of a's in the string is even. e) The set of strings over {a,b,c} in which the length of the string is multiple of 5. f) The set of strings over {a,b,c} in which the total number of a's,b's and c's is greater than 10. g) The set of strings over {a,b,c} in which the total number of b's and c's is 5.
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