Today in class my professor mentioned that there are different types of infinity. This confused me at first because I always thought infinity is just infinity. What are the different types of infinity?
2026-04-05 21:28:41.1775424521
Are there different types of infinity?
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Your professor was talking about the distinction between countable & uncountable sets, established by Cantor's diagonal argument. See also Aleph number, Beth number, equinumerosity, & Cantor's contributions to set theory.