Conversion of Regular Expression to Finite Automata - Examples (Part 1)

This lecture focuses on converting given regular expressions into their equivalent finite automata, building upon the rules discussed in the previous lecture.

The first expression is 'b a* b', which means a string starting with 'b', followed by zero or more 'a's, and ending with 'b'. The finite automaton is designed with three states: a starting state 'A', an intermediate state 'B' for 'a' closure, and a final state 'C'. State B has a self-loop for 'a' to handle the closure.

The second expression is '(a + b) c', representing strings that are either 'a' or 'b', followed by 'c'. This involves a union operation. The automaton starts at state 'A', which transitions to state 'B' on either 'a' or 'b', and then from 'B' to the final state 'C' on input 'c'.

The third expression is 'a (bc)*', meaning 'a' followed by zero or more occurrences of 'bc'. The finite automaton starts at state 'A', transitions to state 'B' on input 'a' (making 'B' a final state to accept 'a' by itself), then from 'B' to 'C' on 'b', and from 'C' back to 'B' on 'c', forming a loop for the 'bc' closure.

The video concludes by summarizing the conversion process for the given examples and hints at more complex examples to be covered in upcoming lectures.