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A comment on How many real numbers exist? New proof moves closer to an answer. Parent comment

Re:How many real numbers exist? New proof moves closer to an... by fighterpilot on Thursday July 15, 2021 @01:26PM (#27847247)
For the same reason that integers have the same cardinality as only odd numbers. You can create a 1:1 mapping between them.
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Re:How many real numbers exist? New proof moves closer to an... by bmitc on Thursday July 15, 2021 @03:32PM (#27849058)
Not just one-to-one (injective) but also onto (surjective). :)
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