Sequence learning
Recurrent state learns a grammar
A simple recurrent network learned temporal context sufficient to recognize a studied finite-state grammar.
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The contribution
The authors trained a network to predict successive elements in sequences generated by a grammar. Feedback from its prior hidden activity let it distinguish contexts that could not be identified from the current symbol alone. The study connected continuous neural representations with the discrete states of an automaton.
What this does not establish
Learning the studied grammars does not establish unrestricted natural-language understanding or success on every formal language. The result concerns particular networks, training data, and tasks.
Why this date?
1989 dates the Neural Computation article. LSTM cites the paper as a study of finite-state automata and simple recurrent networks.
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