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Embeddings are underrated (2024)

(technicalwriting.dev)
484 points jxmorris12 | 1 comments | | HN request time: 0s | source
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tyho ◴[] No.43964392[source]
> The 2D map analogy was a nice stepping stone for building intuition but now we need to cast it aside, because embeddings operate in hundreds or thousands of dimensions. It’s impossible for us lowly 3-dimensional creatures to visualize what “distance” looks like in 1000 dimensions. Also, we don’t know what each dimension represents, hence the section heading “Very weird multi-dimensional space”.5 One dimension might represent something close to color. The king - man + woman ≈ queen anecdote suggests that these models contain a dimension with some notion of gender. And so on. Well Dude, we just don’t know.

nit. This suggests that the model contains a direction with some notion of gender, not a dimension. Direction and dimension appear to be inextricably linked by definition, but with some handwavy maths, you find that the number of nearly orthogonal dimensions within n dimensional space is exponential with regards to n. This helps explain why spaces on the order of 1k dimensions can "fit" billions of concepts.

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1. rahimnathwani ◴[] No.43965258[source]
Nice article related to the last point (nearly orthogonal vectors):

https://transformer-circuits.pub/2022/toy_model/index.html