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Positional embeddings and vector addition

The maths under positional embeddings, from zero: a token becomes what it is plus where it sits, and that 'plus' is a literal element-wise sum of two vectors. Why the differently-sized tables never actually clash, worked by hand, with slides.

16 Aug 2026 · 5 min read

#embeddings
#vectors
#positional-encoding
#maths-for-llms