Regex Set

Creator
Creator
Seonglae Cho
Created
Created
2022 Sep 28 3:48
Editor
Edited
Edited
2022 Sep 28 3:49
Refs
Refs
Regular Expression rr represents a pattern of string, where
  • given an alphabet \sum, we can construct regex rr
if r=a,a in . L(r)={a}\text{if } r=a, a \text{ in } \sum. \text{ } L(r) = \{a\}if r=ɸ,  L(r)={} // empty set\text{if } r=ɸ, \text{ } \text{ } L(r) = \{\} \text{ // empty set}if r=ε, L(r)={ε} // a set with an empty string\text{if } r=ε, \text{ } L(r)=\{ε\} \text{ // a set with an empty string}
 
 
 
 
 
 
 
 
 

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