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I want to see the converse proof for the random coding (shared randomness) capacity of AVC. All I can find online is Csiszar Narayan's AVC paper which looks at deterministic coding. Further, the proof itself is quite dense (using Lemma 2 in the paper).

I am wondering if there is any work that proves the converse of AVC random coding capacity (shared randomness). If anyone can write the proof here then that works as well. I am ok with a proof for deterministic coding capacity of AVC as well if it is different from the above-mentioned paper.

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    $\begingroup$ Some proofs are technical. There's no way around it. $\endgroup$ Oct 7, 2020 at 18:46
  • $\begingroup$ @YuvalFilmus How about the proof for random coding (shared randomness) ? I can't seem to find it anywhere. $\endgroup$ Oct 8, 2020 at 8:06
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    $\begingroup$ Wikipedia gives a reference. Have you checked it? $\endgroup$ Oct 8, 2020 at 8:24
  • $\begingroup$ @YuvalFilmus Thanks a lot. 'Reliable Communication Under Channel Uncertainty' gives a comprehensive survey that helped me find the desired proof. Don't know why it didn't show up in google search. $\endgroup$ Oct 8, 2020 at 12:40

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A complete proof appears in Blackwell, Breiman and Thomasian, The Capacities of Certain Channel Classes Under Random Coding. This paper is linked from the Wikipedia article on AVCs.

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