Low-Rank Approximation of Weighted Tree Automata

4 Nov 2015Guillaume RabusseauBorja BalleShay B. Cohen

We describe a technique to minimize weighted tree automata (WTA), a powerful formalisms that subsumes probabilistic context-free grammars (PCFGs) and latent-variable PCFGs. Our method relies on a singular value decomposition of the underlying Hankel matrix defined by the WTA... (read more)

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