finite automata and regular expression in toc

The desired regular expression is the union of all the expressions derived from the reduced automata for each accepting states Every language defined by a regular expression is also defined by a finite automaton

Motivation: Given a pattern (regular expression) for string searching, we might want to convert it into a deterministic finite automaton or nondeter- ministic finite 

fact that each regular expression can be transformed into a nondeterministic finite automaton (NFA) with or without s-transitions, and all authors seem to provide 

course will be to introduce the mathematical formalisms of finite state machines, regular expressions and grammars, and to explain their applications to 

Deterministic finite state automata define languages that require finite resources ( states) to recognize Ashutosh Trivedi Lecture 3: Regular Expressions 

Given DFA M, will construct regular expression R such that L(M) = L(R) 2 Regular Expressions to NFA Regular Expressions to Finite Automata

Simplification of Expressions For small regular expressions, one can often see how to construct an equiva- lent automaton directly without going through the 

If a language is regular, it is described by a regular expression For the proof, we introduce a generalization of finite automata Bow-Yaw Wang (Academia Sinica)

Conversion back to deterministic models follows A central section deals with transformations back and forth from regu- lar expressions to automata On the way to