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Transformers, parallel computation, and logarithmic depth

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arxiv 2402.09268 v1 pith:3S6C6YCT submitted 2024-02-14 cs.LG

classification cs.LG
keywords transformerscomputationconstantdepthefficientlylogarithmicnumberparallel
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We show that a constant number of self-attention layers can efficiently simulate, and be simulated by, a constant number of communication rounds of Massively Parallel Computation. As a consequence, we show that logarithmic depth is sufficient for transformers to solve basic computational tasks that cannot be efficiently solved by several other neural sequence models and sub-quadratic transformer approximations. We thus establish parallelism as a key distinguishing property of transformers.

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Cited by 1 Pith paper

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  1. Scaling Latent Reasoning via Looped Language Models

    cs.CL 2025-10 unverdicted novelty 7.0 of 10

    Looped language models with latent iterative computation and entropy-regularized depth allocation achieve performance matching up to 12B standard LLMs through superior knowledge manipulation.

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