0 votes 0 votes I feel it difficult to know when to change the state while making a PDA. Could anyone tell me in detailed manner when to cahnge the state . Below is the solution to a problem , could anyone tell me which one is more appropriate with justification. Theory of Computation theory-of-computation pushdown-automata + – dragonball asked Oct 29, 2017 dragonball 226 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.