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A comment on How can some infinities be bigger than others?. Parent comment

Re:How can some infinities be bigger than others? by jltsiren on Wednesday April 19, 2023 @06:37PM (#35634193)
Isn't that more like first-year material in mathematics and in more theoretically oriented CS programs? Once you start talking about injections, surjections, and bijections, you may as well prove some basic results about the sizes of sets of numbers.
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Re:How can some infinities be bigger than others? by yodsanklai on Wednesday April 19, 2023 @06:49PM (#35634291)
There are basically no prerequisites to get a grasp of these ideas. I remember being introduced to this in one of Raymond Smullyan's book when I was a kid.
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