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Write for what might be described as the most elementary nontrivial inverse system of abelian groups indexed by the functions from the cardinal to the set of natural numbers. The question of whether for any fixed the derived limit may vanish for only a nonempty subset of the class of infinite cardinals is recorded in both [Be17] and [Ban23], and bears closely on several related further ones. We answer this question in the affirmative; in fact, we show the maximal possibility, namely that this can simultaneously happen in every degree .

生成讲解博客的中文版本

生成AI智能校验的中文版本