Pushdown Automaton Recognition

Pushdown Automaton (PDA) recognition is a method used by computational models to identify whether a string of symbols belongs to a specific language. It extends a finite automaton by adding a stack, which functions like a temporary memory. As the PDA reads each symbol, it can push or pop symbols on the stack based on rules, allowing it to handle more complex patterns, such as nested structures or balanced parentheses. If, after processing the entire string, the PDA reaches an accepting state with an appropriate stack configuration, the string is recognized as part of the language.