Why Transformers Need Multiple Positional Encoding Waves

A single sine-cosine pair can encode position as a point on the unit circle, but only up to a limit. After one full cycle (2π ≈ 6.28), positions start repeating. This is why Transformers combine many sine and cosine waves with different frequencies to create unique positional signatures across long context windows.

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Видео Why Transformers Need Multiple Positional Encoding Waves канала Inside Systems