= Z-channel (information theory)
{wiki=Z-channel_(information_theory)}
In information theory, a Z-channel is a type of communication channel characterized by the possibility of losing information—in a specific way—while transmitting a message. Specifically, a Z-channel can be defined as a channel in which some symbols can be transmitted perfectly, while others may be lost entirely. This creates a situation where the channel is "asymmetric" with respect to the symbols being transmitted.
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