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What does it mean if a set is countable 2024?
是一个
素数 子集
Questioner:Amelia Brown 2023-06-08 22:31:53
The most authoritative answer in 2024
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Amelia Kim——Studied at the University of Sydney, Lives in Sydney, Australia.
In mathematics, a
countable set is a
set with the same cardinality (number of elements) as some subset of the
set of natural numbers. A
countable set is either a finite
set or a countably infinite
set. ... Today,
countable sets form the foundation of a branch of mathematics called discrete mathematics.
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