The Zyablov bound is a concept in the field of combinatorial design and coding theory, particularly related to covering designs. Named after the Russian mathematician Alexander Zyablov, the bound provides a limit on the number of blocks in a covering design given certain parameters. In more formal terms, the Zyablov bound applies to the problem of covering a finite set with subsets (or blocks) such that every element of the set is contained in at least a specified number of blocks.
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