Looking at the left side of the diagram, we see stuff enters at the bottom (‘input’ text that has been ‘chunked’ into small bits of text, somewhere between whole words down to individual letters), and then it flows upwards though the model’s Transformer Blocks (here marked as [1, …, L]), and finally, the model spits out the next text ‘chunk’ (which is then itself used in the next round of inferencing). What’s actually happening here during these Transformer blocks is quite the mystery. Figuring it out is actually an entire field of AI, “mechanistic interpretability*”.
This pattern (precompute into \csname tables at load time, look up by name expansion at runtime) is used throughout the engine. It is the TeX equivalent of a hash map.
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Юлия Мискевич (Ночной линейный редактор)