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List-Decoding Capacity Implies Capacity on the q-ary Symmetric Channel

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arxiv 2410.20020 v1 pith:SMWF7T5R submitted 2024-10-26 cs.IT math.IT

classification cs.ITmath.IT
keywords capacitychannellist-decodingachievesq-arysymmetricthereadversarial
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

It is known that the Shannon capacity of the q-ary symmetric channel (qSC) is the same as the list-decoding capacity of an adversarial channel, raising the question of whether there is a formal (and black-box) connection between the two. We show that there is: Any linear code $C\subseteq \mathbb{F}_q^n$ that has minimum distance $d_{\min}=\omega(q^3)$ and achieves list-decoding capacity also achieves capacity on the qSC.

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Cited by 1 Pith paper

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  1. Oblivious Deletion Codes

    cs.IT 2025-06 accept novelty 6.0 of 10

    New constructions show that oblivious deletion codes can correct any constant number of deletions with redundancy close to the information-theoretic lower bound, beating known adversarial-code barriers.

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