GNFA stands for Generalized Nondeterministic Finite Automaton. It is a type of finite automaton where the transitions are labeled with regular expressions rather than single symbols. This allows for more concise representation of complex patterns compared to standard NFA or DFA. GNFAs are primarily used in the formal proof of converting regular expressions to finite automata and vice-versa, specifically in Kleene's theorem. The conversion process from a regular expression to a GNFA and then to a DFA/NFA is a key concept in automata theory and compiler design.
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