Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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- Make a conjecture whether or not it is regular and prove your assertion. When you prove a language is not regular, use the game with demon. Do not apply Pumping Lemma directly.arrow_forwardon A language L is called slithy if it contains at least two strings and has the following property: For every two strings x, y in L such that |x|< lyl, the string obtained by taking the first letter of y and inserting it at the start of x is also in L. For example, if L contains aaa and baaba, then it must also contain the string baaa. Prove by contradiction that every slithy language contains two strings of the same length.arrow_forwardDescribe a DFA that accepts each of the following languages. Describe briefly what each state in your DFA means. Do not attempt to draw your DFA, since the number of states could be huge; instead, give a mathematically precise description of the states Q, the start state s, the accepting states A, and the transition function δ All strings x ∈ {0, 1}* such that x contains 0^9 as a substring, or |x| is divisible by 8, or #0(x) − #1(x) is divisible by 7. #0(x) denotes the number of 0's in x, and #1(x) denotes the number of 1's in x.arrow_forward
- Let L be the language L={aPb9cds | pq and q#r} over the alphabet Σ={a,b,c,d). Prove that L is not regular using the pumping lemma. Note: Follow the mathematical formalism given in the textbook. Explain your steps.arrow_forwardon A language L is called slithy if it contains at least two strings and has the following property: For every two strings x, y in L such that |x|< lyl, the string obtained by taking the first letter of y and inserting it at the start of x is also in L. For example, if L contains aaa and baaba, then it must also contain the string baaa. Prove by contradiction that every slithy language contains two strings of the same length.arrow_forwardQuestion 3. Consider the language L = {w€ {0, 1}* | the strings 01 and 10 occur the same number of times in w). Is this language regular or non-regular? Prove by building a DFA (if regular) or using the pumping lemma (if non-regular)arrow_forward
- Problem 1. Consider the regular expression (0|1)*1 over the alphabet {0, 1} What language does the regular expression describe? Use the Thompson's construction method to derive a non-deterministic finite automaton (NFA) that recognizes L. It is enough to draw the final NFA Use the powerset construction method to derive an equivalent deterministic finite automaton (DFA). You must show the computation of e-closures and draw the DFA Use the partitioning method to derive an equivalent, minimal DFA. You must show the partitioning steps and draw the minimal DFAarrow_forwardQuestion 5 Let I be the set of all even length binary strings. (So I is decidable.) Give an example of a language K ⊆ I with K undecidable. Here you need to define the set K and state your reasoning why the K you define is undecidable. Full explain this question very fast solution sent me step by step text typ work onlyarrow_forwardLet L be the language L={aPb9cds | pq and q#r} over the alphabet Σ={a,b,c,d). Prove that L is not regular using the pumping lemma. Note: Follow the mathematical formalism given in the textbook. Explain your steps.arrow_forward
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