word2vec Explained: Deriving Mikolov et al.’s Negative-Sampling Word-Embedding Method

word2vec Explained: Deriving Mikolov et al.’s Negative-Sampling Word-Embedding Method.
Yoav Goldberg and Omer Levy. arXiv 2014. [pdf]

The word2vec software of Tomas Mikolov and colleagues has gained a lot of traction lately, and provides state-of-the-art word embeddings. The learning models behind the software are described in two research papers. We found the description of the models in these papers to be somewhat cryptic and hard to follow. While the motivations and presentation may be obvious to the neural-networks language-modeling crowd, we had to struggle quite a bit to figure out the rationale behind the equations.

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