We consider the transmission of nonexponentially many messages through a binary symmetric channel with noiseless feedback. We obtain an upper bound for the best decoding error exponent. Combined with the corresponding known lower bound, this allows us to find the reliability function for this channel at zero rate.

中文翻译：

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零速率无噪声反馈BSC的可靠性函数

我们考虑通过具有无噪声反馈的二进制对称信道传输非指数多的消息。我们获得了最佳解码误差指数的上限。结合相应的已知下限，这使我们能够找到该通道在零速率下的可靠性函数。