出典:Wiktionary
出典:『Wiktionary』 (2025/05/29 15:02 UTC 版)
From 中期英語 perplexite, borrowed from Middle French perplexité or post-classical Latin perplexitās, from perplexus (“entangled”). By surface analysis, perplex + -ity.
出典:Wikipedia
出典:『Wikipedia』 (2011/04/15 14:51 UTC 版)
Perplexity is a measurement in information theory. It is defined as b raised to the power of entropy in base b, or more often as b raised to the power of cross-entropy in base b. The latter definition is commonly used to compare probability models.
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