Countably
Infinite
Describes a set which contains the same number
of elements as the set of natural
numbers. Formally, a countably
infinite set can have its elements put into one-to-one correspondence
with the set of natural numbers.
Note: The symbol aleph null (א0) stands
for the cardinality of a countably infinite set.
See
also
Finite, infinite, uncountably
infinite, cardinal
numbers
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