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In Tokenization and the Noiseless Channel (Zouhar et al., 2023a), R\'enyi efficiency is suggested as an intrinsic mechanism for evaluating a tokenizer: for NLP tasks, the tokenizer which leads to the highest R\'enyi efficiency of the unigram distribution should be chosen.
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Tokenization and the noiseless channel
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A formal perspective on byte-pair encoding
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Later among the works it cites.
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