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Do not allow malformed grammars #2

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digitalheir opened this issue Jan 18, 2017 · 0 comments
Open

Do not allow malformed grammars #2

digitalheir opened this issue Jan 18, 2017 · 0 comments
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enhancement help wanted

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@digitalheir
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digitalheir commented Jan 18, 2017 •
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Ensure that the probabilities in a SCFG are proper and consistent as defined in Booth and Thompson (1973), and that the grammar contains no useless nonterminals (ones that can never appear in a derivation).

check that no rules are doubled with different probabilities (in which case we either have undefined dehaviour or conflate the rules?)
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