It is proved that the set of closed classes containing some minimal classes in the partially ordered set \({\cal L}_2^3\) of closed classes in the three-valued logic that can be homomorphically mapped onto the two-valued logic has the cardinality of continuum.

中文翻译：

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部分有序集中某些最小类的闭合超类连续体的基数$$ {\ cal L} _2 ^ 3 $$ℒ2 3

证明了封闭类的集合在三值逻辑的封闭类的部分有序集合\（{\ cal L} _2 ^ 3 \）中包含一些极小类，它们可以同态映射到二值逻辑具有连续性的基数。