There is a number of questions on this website about the reversal of regular languages:
- Closure under reversal of regular languages: Proof using Automata
- Proving that the reversal of a language reversal is that language
- etc.
I was wondering what was this concept useful for. Does the fact that the reversal of a regular language is regular has some interesting corollaries for example? Does considering the reversal of a language helps in certain proofs?