Say whether each of the following sets is regular (reg), context free but not regular (cf), or not context free (not cf). No proofs necessary. a. {x = {a,b,c,d}* | #a(x) = #b(x) = #c(x) = #d(x)} (where #a(x) is the number of occurrences of the symbol a in string ) b. {aj is a power of 3} c. {x = {0, 1}* | x represents a multiple of 3 in binary} d. L(0*1*0*1*) e. the set of all balanced strings of parentheses of four types ( ) [ ] < > { }) f. {anbm|n 0} j. {a^b™ c² d³ | n = i or m = · j}
Say whether each of the following sets is regular (reg), context free but not regular (cf), or not context free (not cf). No proofs necessary. a. {x = {a,b,c,d}* | #a(x) = #b(x) = #c(x) = #d(x)} (where #a(x) is the number of occurrences of the symbol a in string ) b. {aj is a power of 3} c. {x = {0, 1}* | x represents a multiple of 3 in binary} d. L(0*1*0*1*) e. the set of all balanced strings of parentheses of four types ( ) [ ] < > { }) f. {anbm|n 0} j. {a^b™ c² d³ | n = i or m = · j}
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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