cardinality of a setの例文

例文

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1. There are two ways to define the " cardinality of a set ":
2. Multiple occurrences of identical elements have no effect on the cardinality of a set or its contents.
3. Since there is a bijection between the two sets involved, this follows in fact directly from the definition of the cardinality of a set.
4. Formally, assuming the axiom of choice, cardinality of a set " X " is the least ordinal ? such that there is a bijection between " X " and ?.
5. The cardinal characteristic non ( \ mathcal N ) is the least cardinality of a non-measurable set; equivalently, it is the least cardinality of a set that is not a Lebesgue null set.