Distributed Representations of Words and Phrases and their Compositionality for Word2Vec investigation
Title of paper - Distributed Representations of Words and Phrases and their Compositionality
I think this paper, Distributed Representations of Words and Phrases and their Compositionality (Mikolov et al. NIPS 2013), is the best to understand why the addition of two vectors works well to meaningfully infer the relation between two words.
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